I’m strongly of the opinion that we should never be hiding the domain for either communities nor users. The domain is an important part of both of those. [email protected] and [email protected] are entirely separate communities and may have very different rules, so it’s important to know which one you’re on.

And for users, impersonation aside (because let’s be honest, impersonation could just as easily utilize display names or look-a-like characters), there’s also just plain confusion from legitimate users. Common usernames are totally going to be used across multiple servers. If you’re seeing comments from [email protected] and also [email protected], you’re gonna wanna be able to tell them apart (display names kinda run counter to this and I’m not certain they’re a good idea).