[justaman]

A better idea would have been a "Rand-aid". A sticker in the shape of a band-aid that covers the webcam so you can still close your laptop.

[Crito]

You could even just use band-aids. The cotton section would protect the lens from the adhesive. You could probably even commission a run of them with some sort of branding printed on the back.

[91bananas]

I cannot upvote this enough times.