In the nicest possible way I really don't think the sites which get up to this sort of nonsense are interested in getting videos of 50 year old plus blokes fiddling with there computers.
Stick a postit note covering the web cam and disable the built in mic and unplug you headset when your not using it.
The remote abuse of webcams has been happening for years.
We used to wind some of the IT's drinking mates up by sending them emails from the helpdesk account with such things as.
"stop picking your nose its un-hygenic and thats a testplant machine"
"could you please move your coffee before you spill it"
Trick was not to use thier machine but one nearby that had them in view.
Then there was the trick of boosting the volume up full and playing the "hey everyone i am looking at porno" wav.
Again with all these things if your using an Admin account for day to day use your making things so so easy for these idiots to do there dirty work.