Sometimes, people that can't handle losing and start accusing everyone of cheating are even more annoying that the cheaters themselves. Yes, some people get THAT good at games, deal with it, it is the same with the word "trolling", there is some real trolling going on but most of the time people start accusing other of being trolls because they don't like and can't agree with their arguments, so it is a very easy way to dismiss opinions without having to come up with counter arguments to refute those claims.
That being said, online player will always be like this, that's way LAN parties were so awesome, it was the only way to enjoy a game controlling for all this things.