I liked CoolHandMike's idea for a webcam cover with a little skull on top but wanted it to be more functional. This version alerts the user when the cover is not closed and he might be watched.
I added the Fusion 360 source files so you can adapt the size to your own webcam.
I use an MK3 with Multi Material Unit, use the files in the folder SingleExtruder in case you don't have a MMU.
The author hasn't provided the model origin yet.