So basically what happened is that the streamer got his tank character summoned to BWL, and gets immediatly dispelled after arriving. Seconds after he asks a GM who is a VIP in his channel if he wants to ban the dispeller for streamsniping, and then contradicts himself by saying that the dispeller spends a majority of his week dispelling. Viewers in his chat are even questioning the decision about the ban going off.
Now personally, I think spending your time dispelling all day is kind of stupid but it’s your gameplay and nothing in the rules forbids you from using your class abilities against the other faction. If blizzard didn’t want it to happen then they would have added some kind of dispell protection against world buffs.
Regardless of the offense, this is not how a GM should be handling this situation. If blizzard doesn’t reverse the ban and properly punish the offenders then they will normalize this favoritism, pointing fingers to ban players at their will.