If he was getting and sending out messages on a regular basis for the past 15 years, I'm pretty sure the feds would have found out by now and he sure as hell would not be in a medium security prison.
Vic did more damage to the Lucchese family than the feds ever did, so why would they care about him sending out messages?
The feds play dirty and with Vic interfering with Lucchese decisions that would play right into their hands.
If the feds need a weapon to destroy the Luccheses, they have it in Vic.
