What is your opinion about players who try to win on time when dead lost?

I love this.  Time adds another measure of compensation for position and/or material.  It's that easy. Crying over spilt milk, OP wants to lambaste those who point out the hows and the whys of spillage.

You must understand that the clock its one of the most important things in chess, not only in bullet or blitz, in rapid and standard its important as well, its not a sin to try to win by doing that, its using all the resources that you have to try to beat your opponent at any cost, remember that chess is a game the simulates war, and in war you have to do everything you can to beat your opponent,  I know its awful when somebody tries to do that to you, even worse if they succeed, but they are using all the tools to try to win, if you dont use your time well and your opponent use his time well why can he make use of that?

In one tournament (standard) I start playing quite fast the opening, my oponent was really slow there and in the middle game as well, the result is that I enter to the endgame in a loss position, he had advantage for the endgame, I would say around 2 points, but he was running out of time, and I had a lot, I start thinking seriously on the endgame, and little by little I was getting some advantage, maybe with more time he would crush me but I safe my time for the endgame and I make a proper use of that, without time you cant make high quality moves, maybe the clock is the most important thing in chess, so indeed is not a bad thing to make use of that fact, the best thing for a chess player is to have the clock as your friend and no as your enemy

Don't know. I just saw a big, thick chunk of words and didn't read the post. If I were to simply respond to the title, I have no problem with players trying to win on time. "Dead lost" is subjective any way. 

Have you ever read a book? A whole book? With chapters, pages, paragraphs of words? A pamphlet maybe? Perhaps a leaflet? A tract even?

The Op posted three paragraphs.  What would you consider to be a more manageable 'chunk of words?'

I don't mind chasing the flag down, i have had some successful swindles in lost positions. What i really hate is disconnects when you don't know if the guy has gone or just being as ass.

I have only had this happen to me once on a 20min game several times on a 5min game it is frustrating but I try to look at it as: 

1.It is my fault for not being good enough to finish the job and I have to take responsibility for that

2. I got to hand it to the guy for being good enough to escape my checkmate attempts.  

Yes, I've read countless books and I read all the time. 

'I just saw a big, thick chunk of words and didn't read the post.' 

You claim to read countless books all the time but could not bring yourself to read three paragraphs online.  An interesting phenomena don't you think?  How are we to make sense of it?

 Kids are used to communicating in text messages. To them maybe 3 paragraphs is a lot.

chess is for winners not losers. People who are determined can try to win the game in any way possible. If that means flagging the opponent, then so be it. All that matters is winning. If you are unable to win then obivously playing on was the right choice by the opponent. 

 I see.  Yes that would explain it.  A whole three paragraphs, man what a mission!

I agree with Mr. Coleman's above: "After all, if they'd played quicker, they may not have had their winning position..."

I remember Magnus Carlsen telling an opponent after beating him in a Simul, "Hey, you had a good position..... It just took you too long to find those good moves." (Paraphrasing) That really says it all. There are also many subjective factors such as set, setting, who your opponent is. I can imagine a scenario when it might be smarmy to flag an opponent, but generally speaking the punishment for poor time management is sometimes dying by the clock.

Human volition. 

this game designated also for fast thinking, and fast thinking is the feature of the game, and the winner regardless of method of winning remains as a winner

Perhaps you live in a world of internet memes, of pussy-cat gifs, glib tweets of 280 characters max and its made you intellectually lazy?  Three whole paragraphs of words, such a mission.