I went through a phase of winning because my opponents just lost interest, and i won on time.
People who deliberately lose.

People who deliberately lose should have a tournament against those players who don't think it impolite to ask an opponent to resign...The score sheets would look something like 1e4 resigns and 1resigns

1g4 - Player 1 then asks Player 2 (2Q1C ? ) for permission to resign
1...e6 Player 2 declines
2f3 Player 1 then asks again if he can resign
Player 2 accedes to Player 1 request, and the latter resigns...GG

It is called sandbagging, but I dont know why that its bad at all, at least in online games and no tournaments it should be ok for 2 reasons:
1) He lose 30 games in a row to decreased his rating but he help 30 players to improve his rating and that is going to make them play against stronger people and improve
2) Once he have the low rating he play against lower opponents but that is good for them, playing against someone stronger is something really good for everyone, I love when I played a Titled player here that has over 2000+
This is only in online games that doesnt matter a lot, in real games and tournaments this is bad, because it cost money and the guy that cheat like this usually wins the prize and it isnt fair, there are some players that are like this and they lower the fide rating in order to play in a lower category than theirs, so if they are a 2000, the can play in a tournaments for -1800 and win most of the times
This just happened to me. It is bad because it is a complete waste of my time.
thanks