Just as in life, you have NO idea what's going on at the other end. A phone call, a child crying, an angry parent or spouse. So relax, play a puzzle in another window (if you're on a computer), or read a news feed if you're on you're phone. There are a lot of worse things that could happen to you, than have to wait a couple of minutes.
You do not really understand the game of chess do you?
This is not boxing, or ice hockey or football, chess is much more serious, and if you think children (WTF???), angry parents or spouses (again WTF?????????) are any possible excuse for this atrocious and cowardly imbecilic behaviour of losers then, frankly, pal, you do not get chess. if you are losing you must resign - if anything else (like kids choking) you must resign.
It's the timing of an opponent who is playing lightening fast and then suddenly stops and abandons the moment they blunder a piece. It doesn't happen often but when it does it's clear they have abandoned because they're in a losing position. Similar behaviour to how opponents abort a game when they start as black because they only like playing as white.
I don't have other windows open when I'm playing a live game in-case it appears suspicious to fair play detection or the site thinks I've abandoned.