I thought about this and decided against complicating ways in which this can be restricted. Honestly, this is a super simple challenge to solve. Perhaps I should introduce this as an API parameter to detect variations. That way, not just taylor_swift but t_aylorswift, ta_ylorswift etc. could also be detected and flagged.

As for realtaylorswift, I thought about that too. I don't think — and this is my personal opinion, obviously — most platforms wouldn't want to restrict this because then it really becomes unmanageable. I could obviously be wrong though and these could very easily be introduced to the API also (i.e. detect obvious username patterns) and totally open to adding that as an API parameter too.