I'll try that the next time I go to the bank, I'll ask them to turn all their cameras off because I have "no expectation" of anything going wrong while I'm in there. Let's see how they feel about that.
The police officer is a civil servant, he has an expectation to act above and beyond reproach.
Let me ask you this, irregardless of how the video was created, should he be disciplined?
"Don't touch the things, this is a local shop for local people, there's nothing for you here."