Unfortunately you only hear half the story with these things. If somebody is being abusive report them and then it's up to GM's what action to take if any needs to be taken. In many cases people report because of petty arguments they have and the ones doing the reporting can often be the people in the wrong like they didn't do something well and the other person got annoyed. The problem often starts when 3 people are from the same group with 1 random and they gang up on them and when that person fights back they report them.