Public Accountability

Might succeed where other things have failed, at stopping malicious authority figures abusing their positions:

As the officer began spraying the group of students, onlookers screamed, "Don't do it! Don't you do it!"
A news account captured the officer on camera spraying the students. The account names the officer as UC Davis Police Lt. John Pike. He did not return a voice mail message nor an email left Friday night. His voice-mail box eventually filled up to capacity as his name and phone number were posted on Twitter.

It is so much more effective to be critical, when you know who the bad guys are.