VisReport to who? To ETF2L? For what? For something that happened over a year ago? I doubt somebody would care anyway.
Maybe that's the reason why people keep silent about things like these, they believe nobody would care. It's true to an extent, though
Did edit my post after you quoted to reference the timegap. If we are to actually continue this discussion, make a change about the scene and hammer down on comments like these where Valve cannot do it in the same way Blizzard can, then yeah. Report them to ETF2L, UGC. See if they can be warned for this behaviour. Drive out the toxicity. The loop of "People won't care, so I don't care, so people won't care" won't break otherwise.