Abuse is a valid issue. The best way to avoid abuse is disclosure. Allow citizens to see what's on the cameras. Go to the internet and see live what they are looking at -- with a 15 minute delay. You can spot abuse if its happening.

Not using a technology because abuse is possible is pretty stupid. Set reasonable rules. Create reasonable access to see if rules are being followed.

In a city like Detroit with crime as it is, I'll even take a small dose of abuse if it helps control crime. The important result is public safety and a vibrant city, done with large dose of freedom.