That is both a criminal and civil offense.
Gunowners should file a class action suit against them all, strip them of their funds and lay waste to this crap once and for all. A group of 80,000,000 (or so) plaintifs should carry some weight.
A Class action lawsuit? No, it needs to be a Criminal complaint!
I don't care if I see ONE DIME in compensatory damages. I want my Rights back and I no longer want to live in fear of being shot by government agents for simply putting those Rights into practice.