[spec_laconic]

Yeah, you can just take a quick pic using the camera; the light flashes for barely a second and you won't notice. Metasploit has a stager for exactly this purpose: http://www.metasploit.com/modules/payload/osx/x86/isight/rev...

[kaybe]

There's always a bit of black cardboard and tape. Try to take a picture now. :)

[leke]

Lol, I actually have a bit of duct tape over my eeePC web cam.