No. I doubt a lot of people actually believe these loonies anyway, so why give them an excuse to claim they're being punished for their beliefs?
Making it a criminal offence could also make other people think, "Gee, if the government have gone to such lengths to shut them up, maybe their theories have some merit to them."
Leave it be, I say. Pretty much everyone else is laughing at what they've come up with, and the only harm its doing is getting people annoyed.