Minor wording change!

[dlublin]

Hey Darius!

Always loved this repos, but as I was revisiting it for a new bot, I had the realization that if you were to make this today, you'd probably do a few minor things differently with naming, eg using banlisted instead of blacklisted.

No sweat if you are too busy with other stuff or if this would cause a whole bunch of problems for people with code in the wild, just thought I'd leave it as a note!