It's not a terrible idea, but I also don't see any real point to it. Usernames would be easier, and I don't see why anyone would be putting weird characters in them.
I'm one of those people who does that, besides Shido and very little few more. I don't have a problem though, because I have a link where I can copy/pasta the characters, the problem will be when people who have no idea of where they got their weird characters, will try to change their name to it.
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