He who knows only his own side of the case knows little of that. His reasons may be good, and no one may have been able to refute them. But if he is equally unable to refute the reasons on the opposite side, if he does not so much as know what they are, he has no ground for preferring either opinion… Nor is it enough that he should hear the opinions of adversaries from his own teachers, presented as they state them, and accompanied by what they offer as refutations. He must be able to hear them from persons who actually believe them…he must know them in their most plausible and persuasive form.
- John Stuart Mill
Yep, it’s officially promoted as a symbol of being involved in that war that then generalized as a sign of being patriotic. I mostly described military bloggers, but regular idiots too started to change their and their communities names to include english Z and also S V O into their nicknames on the web. The right hand rule is if you see an avatar with Z or a person who has uppercase english letters you just block them for they are long lost.