Haha, once I did this in real life. I stopped the clock with 1 second left and said "I resign"
My opponent was my friend, but made fun of me in a way that let me know he was pretty annoyed... which surprised me. I didn't do it to be rude, I just did it because I realized I was lost.
In online chess, generally, the people who want to annoy you will do much nastier stuff like stalling. They wont move or resign and let their clock run out. Resigning 1 move away from mate is pretty harmless, at least I don't think it's worth getting upset over.
Hi guys!
Some players I play with resign just before my last move when they see it's checkmate.
Is it a correct behaviour? For me it's very annoying.
Thanks.