This is something that originated among preppers that have ham radio licenses. Nobody "owns" a particular frequency on the ham bands. Anyone can use any frequency, although there are frequencies and segments of bands that have been designated for particular purposes through "band plans" which are gentleman's agreements. It's just common courtesy to not, for example, carry on a simplex conversation on someone's repeater frequency.I see on many prepper and survivalist guide the channels:
445.975 "ham U4"
Are these Ham radio restricted channels?
If you're running unlicensed on those UHF frequencies, they can absolutely "interfere" with you. You have to be licensed to be there plain and simple.They aren't actually restricting anything, it's part of a SHTF (s*** hits the fan) communications plan that their members are supposed to congregate on to maintain regular contact. You can still use those frequencies, and if you are using it when they want to use it, they can't interfere with you. They might try to bully you off the freq but that's basically it.