I said "Hey, how come you keep using Provoke?" in which he replied "Enmity" and I said "Oh.You know it doesn't actually generate enmity, right? The tooltip is wrong. All it does it put you 1 enmity above whoever has the most enmity, which is already you." and he replied "Fuck off" and went on to explain how a "shitty" BLM shouldn't be trying to tell pro tanks how to play their job despite the fact I play a tank, too...
I could have added a few "excuse me" and some smiley faces, but I doubt it would have changed anything.