Playing satire in public where people have to know you to know that you're kidding is a dangerous thing. If it starts to reach enough people, plenty of them won't know you're kidding, just because they don't know you well enough to know that's not "really" you. At that point, the honest defence of your actions - "I was just kidding!" - sounds over-defensive and insincere.
So, to summarise, if you tell a joke by acting out of character, someone won't get it, and then it's very difficult to take it back.
Mokalus of Borg
PS - I'm aware I'm advocating a chilling effect.
PPS - Or, from another perspective, a good PR move.