Not really: there would still be witness testimony without cameras.

This being said: I’m not opposed to surveillance. Want to put a camera up in your place of business or home? Be my guest.

I’m opposed to CENTRALIZED surveillance i.e. the footage being available to scum in government or large corepirations (Google, etc) by default. Gas station owner with camera and DVR: good. Dropcams sending footage from millions of cameras to Pappa Google: bad.

Same with cameras on streets operated by police without strict restrictions on data retention time. Dashboard cameras, on the other hand, are a good thing.