Not cute, not funny. It is voter intimidation, harassment, and unreasonable search & seizure. I say prosecute them to the fullest extent of the law.
How about the possibility of the Tea Party and other offended groups filing a civil suit in federal court against the IRS for violation of their First Amendment and federal statutory rights (Bivens action)? What kind of damages might be expected? How would the attendant publicity play out?
Seems to me that there would be a great reservoir of popular sympathy for the cause of the plaintiffs in such a case.