Mafia: general discussions.

but what if someone likes it.

The Lizard definitely won't like it. He already wrote his opinion about games without revealing roles. He even convinced me that "blind" play won't work here because it's immediately obvious which roles are missing from the newspaper.
You won't be able to stop anyone from revealing information. All these bans are easily circumvented. Moreover, even modkill won't scare the dead. But if someone can suggest a balance where not revealing roles starts to work like not revealing roles, then you can allow the dead to say whatever they want. It's interesting when 3-5 dead town investigators suddenly appear and start saying who is Mafia and who is Town.