Armchair opinion, but shouldn't be too bad - it's identification, not authentication, just like your e-mail address is.

But probably best to not advertise it too much.

That still has "squatting" risks as described in the original article though, domains expire and / or can be taken over.

That's assuming community input / democracy, but especially online there's a good argument to be made for authoritarianism.

> If someone can't figure out what you're saying, and don't care to try,

This puts the onus of being comprehensible to the reader, which isn't fair I think. If you can't get your point across in a way that is comprehensible, maybe don't post.

Ah, good old lmgtfy links. I googled it just now and it seems to have broken.