if you
suspect they are breaking the rules or residing somewhere other than the
address they provide the FCC. The FCC will do the rest.

The problem here is that these hams who are obcessed with illegal CB
are probably not breaking any of the FCC rules, I belive some of them
would turn their own mother in if she went over 4 watts.
You'll have to catch them breaking some other law, maybe if see one of
these guys hanging around the truck stop with his camera looking for
Galaxy radios, call a cop and accuse him of being stalker or pervert
or lot-lizard.