Don't be a Jerk After Intentionally Feeding and Griefing

I do not understand why some people feel the need to be that kind of person who trash talks others for ruining games for everyone. If they get called out for intentionally feeding, stealing cs/jungle camps, and keep doing that, that's one thing. But to take it to the next level and say "eat S#%t" or verbally harass their own team over being asked to not take cs from their jungler or other lanes is ridiculous and uncalled for.