Maybe I lost faith on people in this game, maybe I'm being realistic. Which ever is the case, I wouldn't want to see high ranks disturbing low ranks. Therefor, I'd disable their chat while spectating.
It's worth mentioning that "disturb" is quite a light verb compared to those I've got in mind.
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Don't ever look down on someone unless you're helping him up. Don't ever treat someone else the way you wouldn't want others to treat you.
We're all people.