@D3C4FF has asked a great question and I would like to follow up on that. Basically he had asked whether "[...] an attacker can identify if a CCTV camera is on/operational without direct physical access to the cable/camera[.]".
I was highly impressed by @TildalWave 's answer, and particularly about disabling cameras: "[...] all you need is a decent pocket/torch size green laser (532 nm) directed for a few seconds directly into their CCD/CMOS sensor.".
I remember some 10 years ago kids in my neighborhood had found out that you could 'DoS' the street lights using the same technique (by pointing the laser to a point near the back of the light bulb). I figured out that this was because those posts light automatically when it gets dark (meaning lack of light) and as soon as it gets bright (meaning light went inside its sensors) the light would turn off.
So I would like to ask:
1 - How does this laser attack apply to cameras?
2 - For which types of cameras does the laser pen attack work against (CCTV Vs. IP)?
3 - Is the laser pen attack the only vector against those devices (apart from obvious things like fire, TNT, acid, shooting, etc)?
4 - Why are cameras still vulnerable to it, if at all?
5 - Finally, how can I prevent those type of attacks against my cameras (they are all IP-based)?
Just a quick edit for those who (like me) was not sure whether this question was appropriate for the site, I have posted a question on Meta.