Better yet, go to their door and invite them to take them.
I can see a lot of “Let’s get Mikey” looks on LEOs’ faces at the prospect of going door to door to search for and confiscate firearms. “I’M not gonna try it!”
However, if this crap does go nationwide, I still suggest the strategy of “retreat and escape, organize with others, and engage those who sent the confiscators, but on YOUR terms”.