You're saying two separate things.

We should make sure police don't abuse their power. That's what auditing and strict access controls are for. If someone abuses it, they are held accountable.

But that doesn't mean you need a warrant for everything. It's much like police have guns and can use them at their discretion, but every time an officer draws a weapon of fires is brought under scrutiny. It works exactly the same way. Imagine if police had to go to a judge before they were able to draw their weapons!

But Flock cameras aren't a gun, and they should be held to the same standard as any other information-gathering - it should require a warrant.