Today I saw one of my coworkers having the front camera on his phone covered with a sticker. He was afraid of malware activating the camera... Pffffffff....
I've seen a lot of stickers on laptop webcams since that dutch pervert got busted who was peeking at webcams from hundreds of people with them noticing it
I leave the camera uncovered and even accurately position a few lights.
Who knows? Maybe one day I'll be noticed and called for acting in some good porn production