Prevent people from registering with certain names

Hello, this week I had a problem, people were registering on my site as “usernameAdmin”, and there was nothing that allowed me to prevent this. This confused my members because they thought these users had admin rights. There are the ,,Blacklist Words” but they seem not to work if the username just contains one of these words.

I would suggest not letting users create accounts with names which contain a string with one of the blacklist words or adding another list.

Thanks!