Under the heading of "Political and Anti-Government Rhetoric" you will read the following:
Militia members most commonly associate with 3rd part political groups. It is not uncommon for militia members to display Constitutional Party, Campaign for Liberty, or Libertarian material. These members are usually supporters of former Presidential Candidate: Ron Paul, Chuck Baldwin, and Bob Barr.These dangerous militia types shouldn't be confused with "normal" citizens who believe that subversive behavior against the Constitution should only occur at the ballot box, as indicated by their display of Obama or McCain material.
So, I suppose if you want to avoid needless hassle on the highway at the hands of a patriotic Missouri trooper, you might want to peel off that Ron Paul bumper sticker before driving through the Show-Me State.