If someone is annoying to you but not breaking any rules, that's what the ignore list is for.
You can access it via your profile.
Banning people who say things you personally don't like is how you end up with the situation that resulted in the mass exodus we had however many years ago. Creating echo chambers is boring. 2p2 politics is a shell of its former self. Don't get me wrong; I'm glad a select number of those self-righteous douchenozzles are gone, but it's undeniable that the place is less lively.