I'm certainly no expert...but how can you tell they are fake tags (other than the newer rivets)....if someone went to all the trouble to create a fake tag...why wouldn't they reproduce the correct rivet?
If this is the case that they are fake and not disclosed as fakes, there should be hell to pay.
It is accepted practice on this board and others not to openly talk about the specifics of repop tags.
Email me and I will talk with you there if your interested.
I am no expert on the law part of this, but I do not think messing with cowl tags carries them same weight as messing with Vin #'s.
Having said that most real car people do not like the repop tags at all. That's why we as a group keep reporting and posting them. Same goes for the real tags for sale on places like E Pay.