If blizzards confirmation isnt enough then who are you even going to believe? I can't think of anyone whos actually more reliable blizzard in this case. You prefer to believe random angry people on the internet who got banned for cheating?
I completely believe Blizzard, but are you seriously suggesting that any time anyone is critical of that company, if the company says "not true" they must be correct?
Im simply saying that blizzard wouldnt lie when they say that playing on linux will not get you banned. I did say "in this case" specifically, because im not going to claim that they never ever would lie.