I'm happy to say I've never had this problem. I actually had the opposite of this at the first party we had after the keg fridge was in place. I went downstairs after the party to pick up and found a mason jar (the fridge is about 10 feet from the canning shelves) stuffed with 1's, 5's and 10's sitting on the fridge. I didn't put it out.
I was a bit worried as several of my friends are cops or lawyers or judges and Federal officers of one type or another. I later found out the buddy one of the cops brought along had set it out. I thought I was going to hyperventilate when I found out the guy was ATF. He told everyone "this stuff ain't cheap to make, kick in if you want more",
I don't think the authorities care unless you advertise.
Hopefully you can reach an accommodation with your buddies.