Sousveillance seems to be happy medium: it's more secure than surveillance since the work is crowdsourced and there are no privileged actors (i.e. the watchers) that are free of surveillance. It's less prone to abuse of power because everyone is being watched, and everyone is doing the watching, so abuses will quickly come to light.

Security, privacy, freedom: choose two. I'd gladly sacrifice privacy for the others, as long as everyone else does the same.