No. I could stop af any time. I just choose not to. Its totally voluntary.

(Just like smokers, they could stop at anytime, they just choose not to)

Unlikely. I often forget it exists. If I didn’t think about a friend or relative wanting to send a message, I’d probably leave it on a table or something until I need to take a picture or note or look something up. And then it would probably be out of battery.