Well all’s well that ends well.
We bumped into him out the front tonight and asked him lightheartedly about it. Turns out he wasn’t making that sign at all. His brother had been plastering and had plaster all over his hands. When he pressed the button, he left a plaster mark on it, so he walked up and wiped it off with his sleeve in a motion that resembled the insulting sign. On review of the footage, I can clearly see that his brothers hands are caked in plaster, and he is indeed wiping it.
He said he actually had no problem with the camera and showed us on his phone that he and his wife liked the idea so much, they have ordered their own off amazon.
I really need to stop jumping to conclusions, I’ll end up getting my face kicked in one day.