Turn it off. Require a password for login. Use findmymac.
Excessive: Put a camera in your living room.
Maybe I am paranoid but if drive is not encrypted you can still get into it by mounting as an external drive
As for camera, that shows you who has it but all data is lost/stolen.
Wowsers, that is a really nice looking tether.Macs no longer have security slots, but Kensington still makes a locking tether.