An article on blinding security cameras with lasers

http://www.c-h-a-o-s.com/2007/08/11/sniping-the-security/

It sounds like a little tweaking might be needed to get this working perfectly, but the idea seems sound. Any ideas for defense against this?

I think you can get dome housings to retrofit to existing cameras, so this might be a reasonable solution.

It should be easy to do some simple testing with a laser pointer. One of the comments on the site mentions that it is a more effective attack if you use a blue or green laser and a lens to spread the size of the dot over a larger area when it hots the camera.