[Soundwave-]

Something that should be brought up is the fact that there are multiple places that use display names just fine, with little to no confusion, even in retrospect.

If somebody changes their name in such a way they're difficult to identify, they either:
a) lose their reputation within that context, which is, for most, a bad thing
b) are trying to hide a bad reputation. Contexts where this is significant should be using alternate methods of identification anyways.

I dunno, I just don't foresee this being a place where name scamming will be particularly prevalent, and if somebody is just changing their name to change their name, so be it.