Thinking we should have a right to anonymity irl is a little silly to me, I think forcing protestors to identify is fairly reasonable. A lot of the rest is getting a little out of hand, though. Private investigators are a pretty egregious step before one has strong evidence of some sort of malfeasance more significant than occupying a space and sitting there.
It was just a matter of time, we’ve had automated vacuum cleaners for ages now.
Putting guns on them is a bit harder, you definitely want a well-tested system for that. But cameras is pretty easy.