Stream monsters have NOTHING to do with this; they are a variable nobody can control just like the rest of the internet. You have your equivalent of stream monsters on blogs, on youtube, hell even in the Wall Street Journal comment section.
There is a world of difference between random a random comment on the internet aimed at your direction and your fellow competitor, sitting right next to you, who's supposed to be a coach! lol
I remember Aris making real life sports comparisons saying that the stands in any sporting event can be pretty rowdy and vicious but he missed the point; on the field there are strict rules of sportsmanship where if you break it you are immediately punished. Online trolls will always be online trolls in whatever form, to use that as an excuse for real life behavior to someones face..not buying it.
The stream monsters are a part of the community...even in Starcraft you are going to find *SOME* meanspirited shittalking on the internet in forums, etc. But that behavior should not bleed over into the actual competition where competitors are made to feel like crap because of their ethnic/religious/sexual makeup.
And, let me get it out of the way, some of the trashtalking can be fun and insightful, the problem is that a vocal minority of t the community don't have the common sense to know when to quit, and its unfortunate that some aren't taking them to task so hopefully they get it. Let it slide, it just gets worse *shrug*