A biker who lives in Gateshead, UK and works on an oil rig was targeted multiple times by thieves who wanted his KTM. Five times in nine months, to be precise! His KTM was kept in his garage which was still under construction and didn’t have a door to stop the culprits. The owner of the bike decided that instead of paying for an expensive security system he could install a CCTV camera to monitor the garage himself.
The problem with this choice is very simple. A camera doesn’t stop anyone. It might discourage some but definitely won’t stand in front of the burglar and make sure he doesn’t finish his job. Unless there is someone constantly monitoring the cam, a burglary can happen and you won’t know until you find out that whatever was stolen is missing.
It’s easy to spot a missing KTM, so after it was stolen the biker went to the police with the video showing the burglars’ faces and even posted it online in hopes that someone might recognize them. Watch how two guys face the difficulties of stealing a bike that’s chained to an underground anchor!

You’re absolutely right.
This fact has been demonstrated again and again: by a comprehensive study for the Home Office in 2005, by several studies in the US, and again with new data announced last month by New Scotland Yard. They actually solve very few crimes, and their deterrent effect is minimal.
Those are great ideas; I use two or three already