You have come up with one low-tech solution, in my view. Use a paint-ball gun to coat the lens. I'm making the assumption that cameras will be mounted high enough that your "bag-um" technique would be pretty tough to manage LOL.
Wonder how hard it would be to disguise a paint-ball gun as a long-lens camera? Just a thought.
"You have come up with one low-tech solution, in my view. Use a paint-ball gun to coat the lens. I'm making the assumption that cameras will be mounted high enough that your "bag-um" technique would be pretty tough to manage LOL." Well, citizens with cherry-pickers can "pick off" the high-up ones. I guess they'd have to outlaw cherry-pickers.
Many cameras are easy to reach. For example, the "red-light" ticket cameras in L.A. are prominent and at low elevation...certainly not higher than 8-10 feet.
--Boris