With all my employees, i put a piece of painter's tape over the webcam on their company issued laptop and explain why. (i wouldn't use a band-aid)
Another smart idea, when answering the account recovery questions for email and other sites with personal information, don't answer the question appropriately, use the answer from the question above/below it.
What city were you born in? A:(dog's name)
What was the name of your first pet? A:(city where born)
IIRC, Sara Palin's yahoo account was successfully compromised because the answers to her account recovery questions were publicly available. city where born, high school, etc..
Reject facebook friend requests from unknown people, limit employment/contact/location information to certain groups of friends to limit exposure.