[partly_cloudy]

the denylist on the site is actually pretty quite simple. for now, it's just a list of chunks of words and the form validation will just compare the username against that list, where each chunk in the list if used as a regexp

[monroewalker]

You could also consider shadow banning these users. If you're immediately preventing them from creating accounts with certain usernames, they'll probably just get more creative with the profanity or save it for their posts.