And it NEVER even occurred to me to ask for a draw if I DO slip! Us♟ players are generally NOT warm, cuddly or particularly generous individuals when it comes to our beloved points.
Mouse Slip - how to react?

You reported them for not answering you in chat? You're barmy!
You were harrassing your opponent.
In speed chess, mouse slips happen because a player is trying to move fast. They aren't taking care and are trying to save time. Speed chess is very much against the clock. You can be careful and play slower or play faster and win more on time. That's your choice and you obviously have to accept losses cause by trying to play too fast.
Also, if players accepted draws then that would be taken advantage of and everyone would be claiming a mouse slip if they made a bad move. I don't play bullet because it isn't chess. It's just a competition in moving faster than your opponent. Imagine if someone claimed a mouse slip in bullet. Compounded insanity.
I was playing on my phone. Not so much a case of trying to move fast as an accidental brush along the line.
I agree re people shouldn't be taken advantage of when someone has made a bad move but I think in the case I mentioned, i.e. checking someone with the Queen and then if they subsequently block with a Bishop and your Bishop then lands up short on the line - on the very next move - it's pretty obvious that wasn't your intention and not what you would have done over the board. My view of human etiquette in that position is obviously different from the prevailing chess community view.
My reporting was more around the stalling aspect more than anything else. I was very clear I would resign, so I don't really see that as harassment, but subsequently just leaving me hanging I consider bad form. Again I appreciate this is just my personally ethical view rather than what would seem to be the prevailing chess attitude...

Generally I'd say that's true and fair enough. But we're talking a 10 min game were they'd taken my Queen within the first minute (as far as I recall).
For me though, I'm not looking to be "arsery" about it. I was just laughing at myself for being so off about where the perceived etiquette / correct ethical play stood compared to what I thought. e.g. looking at chess as more a thinking man's game it's just weird to see it's just accepted practice you "mug" your opponent in such a situation. I really thought players were more honourable.

Had one earlier today which resulted in me losing my Queen. I meant to play ...20. Be4 but played ...20. Qxd5 in error because I had selected the Queen anticipating 20. Qxc2. I just resigned.
https://www.chess.com/analysis/game/live/51801642683?tab=analysis

If a game is important then winning by whatever legal means is fine. A mouse slip is human error, just like a bad move. If a game is unimportant then winning by whatever means is fine too cos its not important so the person making the mouse slip just has to live with it and can resign and move on.

Everyone who plays online chess has experienced the mouseslip, or unintentionally moved a piece where they did not want to move it because their mouse "slipped," or perhaps they dropped a piece one square away from where they wanted it. There have been many time where I hung my queen or a rook and then the game is immediately lost, many times where I have lost large advantages due to mouselips, and even a few times I have botched up a mate in one because of a mouseslip. In OTB chess, a mouseslip, obviously, would never occur, hence why it is called a "mouseslip," so in my opinion, in a effort to make online chess as realistic, if you will, and enjoyable as possible, I don't think a little grace in the situation of a mouseslip can ever really hurt anyone. If my opponent mouseslips, and I am now winning as a result, I offer them a draw. If I mouseslip and am now losing, and my opponent doesn't offer a draw, or somehow offer compensation, I suck it up and move on to the next opponent.

Honestly, if I mouse slip, I don't resign even if the situation continues to be bad. This may just be because I am just low level, but usually I always have a come-back.
Here's proof from my most recent game.
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Nf6 6. a4 Rb8 7. axb5 axb5 8. d3
Bc5 9. Bg5 h6 10. Bxf6 Qxf6 11. O-O O-O 12. Re1 Bb4 13. c3 Bc5 14. Nbd2 Ba6 15.
Rxa6 b4 16. Nxe5 Qxf2+ 17. Kh1 Nxe5 18. d4 Nd3 19. Rf1 Qxd4 20. cxd4 Bxd4 21.
Nf3 Bxb2 22. Qxd3 Bc3 23. Ne5 Bxe5 24. Qxd7 Rbd8 25. Bxf7+ Kh8 26. Rxh6+ gxh6
27. Qe7 Rde8 28. Bxe8 Rxf1# 0-1
Sorry, can't upload it

My question to the greater chess community is, what is the proper etiquette if your opponent has a "mouse slip". I recently played a game where my opponent made a bad move and claimed he had a mouse slip. I would have let it pass but he accused me of taking advantage of him. I considered his behavior petty and ungentlemanly but it begged a bigger question. What is the proper thing to do? There must be a rule in regular chess if a player drops his piece, etc.
Yours truely, Hardboiledeggs
Turn on Confirm each move to prevent a mouse slip‼️

Magnus mouse-slipped against Hikaru : https://www.chess.com/forum/view/general/magnus-blunders-his-queen-in-a-match-against-hikaru

I play on, obviously resign if the situation turns out to be bad. As an opponent I feel understandable and say that's happened to me as well (I recall moving king one step when planning to castle)
I too play on and was winning in a game but mouse slipped and lost

ive had many mouse slips let it go and move on to the next game. not your fault that your opponent was careless lol

Mouse slips can occur for many reasons, including software conflicts. Because of the difference between how pieces are moved online and OTB, if my opponent makes an obvious mouse slip, I will ask him if that was indeed the case and offer a draw. The only time I don't do this is when my opponent has already made it clear that he is a jerk.
I’m trying to do better in this area - I play on a tablet so I refer to it as the dreaded “finger slip.” I see that I have much less restraint as the other commentators here. I’m definitely NOT endorsing what I do but a creatively stringed together collection of expletives uttered between clenched teeth 😬is generally how I react. 🤬🤬🤬