While I do agree that it probably shouldn't be allowed, I don't see how it's "dehumanising" for the person involved (after all, they chose that username). And it's not like other usernames make it any less difficult to put together a mental image of the person.

It shouldn't be allowed because it's obnoxious to the rest of the users.

What about other forms of punctuation? Is it just the full stops and spaces you have issues with, or if they were replaced with say, commas, would you find that more acceptable? Or are you suggesting we should stick with (e.g.) characters entirely from various alphabets and number systems?

do you realize the site is run by someone not named Art and not made of Code rite

@Mithrandir24601 Punctuation is fine, but there should also be some alphanumeric characters too. (Including non-Latin characters. Something pronounceable IMO. Usernames should not be only emoji for example.)

There are plenty of scripts that people use for names that I don't know how to pronounce, and plenty of ways to use Latin characters in ways that aren't pronounceable or that might cause confusion with other users.