The Postal Inspection Service is a useful tool. Mail fraud brings down a lot of sleazeballs that would otherwise have gotten away. Maybe because that's the last thing they would think to cover up.
You make it sound like one of those grab-bag offenses like resisting arrest that effectively amount to `you pissed off the government and now we're going to punish you for it'.
Except "resisting arrest" is your word against an officer's, while "mail fraud" (from what I understand, IANAL) still requires the state to meet the burden of proof.
