This is a problem not just in profanity filters but also on marketplaces like Etsy. Heaven forbid anyone named Harry Potter wanting to sell on Etsy. They would

This is a problem not just in profanity filters but also on marketplaces like Etsy. Heaven forbid anyone named Harry Potter wanting to sell on Etsy. They would more likely than not find themselves banned with little recourse. In this case for 'trademark' reasons, but the problem is the same. Filter for a set of things, and eventually legitimate examples of said thing are going to get caught up in it.