I would say the chance of them doing that is very slim.
I did have a friend from Pennsylvania that recently got charged a nice bill for all the cigarettes he had purchased online from a reservation. My guess is they were required to give up his order information. That's about the only way they could chase you down, the seller would have to give you up.
I hope that makes sense.
Bottom line I don't think they are going to put you in jail for not paying taxes on an out of state bass or gear. Now a house or car might be a bit more risky.

Good luck,
Dirk