illegal use on land for hunting
The USCG is only going to monitor it's working channels and the emergency channel. Same thing with other gov't and commercial channels. If people buying these radios to hunt with knew to stay on 68, 69, 71, 72 and 78, they probably would never run into an issue. That's obviously not what's happening.
fcc auction coast guard freq
The VHF Public Coast Service frequencies were auctioned in 1998 and 2001. Some of the spectrum in non-coastal and non-inland waterway market areas was sold by the auction winners and is used by various licensees. FCC Auctions: Summary: Auction 20 FCC Auctions: Summary: Auction 39