There's probably an authoritarian on each of your friends calling for banning A or B.
I like to use Penn Jillette's mnemonic of imagining the hypothetical justified use of a gun to evaluate situations.
I'd use a gun to stop someone who was trying to kill me.
Ban killing, all right.
You'd say that there just a few situations where you'd really pull the trigger.
Thus, there are just a few situations where banning is justified.
Those are the situations that go against freedom, hence related bans are pro-freedom.
Every other ban is against freedom. It's motivated by fear of losing control and authority.
