Just because people don't agree with your opinion doesn't mean they aren't listening.
I wouldn't pull my dog's fangs if they were a biter, or a cat's. It's a lemur, and you're forcing it to interact with people, and now that it's getting older and behaving like a lemur should, you want to pull it's teeth out?
You have a wild exotic. It's not a pet, and now that it's older(about the same age as most primate "pets" that need new homes.. go figure), it's behaving exactly as it should.
Pulling it's fangs is not a answer to modify the behavior. Treat it as a lemur, instead of a pet. You treat your marmosets like wild exotics, right? Or did you pull all their fangs too?