One thing I want to point out is that some players are REALLY easy to be manipulated by comments, "shit-talking", binds and I have even played versus/with a few people who go crazy after you taunt them once (I am talking about officials not casual pugs or doublemixes...etc).
If people are going to get so bothered by such a thing, they should not be surprised people will do it to them if they are likely to react and break their concentration. One example of note is the ETF2L NC tournament where Sweden were purposely taunting one of our players because they knew he would play worse if you did that to him.
There is a line you should not cross, but there are also mind games and if people aren't strong enough mentally to deal with this, they should expect a worse performance.