Wow. Okay.
I think immediate dismissal in this case is a little over the top (in my country it is actually very difficult to fire someone and can only be done by following a lengthy series of warnings etc), but I agree with the basic premise that censorship is an infringement of the rights of others.

I do NOT believe the librarian had a right to impose censorship, and she would have been better to discuss her concerns with management. But still... I think a warning might have been a more appropriate course of action.