Um, I don't know about you, but while I do admittedly charge my phone on the bedside table, the phone is sitting usually face-up. That means the main camera is pointed at the table surface directly below it so it's useless, and the front-view camera is pointed at the ceiling. The only thing that front-view camera is ever going to see in that position is the belly of one of my cats when they decide to walk over it. (Sometimes the phone is face-down, but this isn't really any different, except that hackers will now have a higher-resolution view of my cat's underside.) The mic is definitely an issue though.
The devices that come to mind immediately as a real danger in this way are these new "smart TVs", since on these any camera is pointing directly at the users in their normal TV-viewing positions. If the TV is in a bedroom, that means it's probably pointed at the bed and has an excellent view of whatever activity happens there. And why a TV could possibly need a camera and microphone, I have no idea. If we ever get to the point where we're Skyping people over TV screens, I can see the use, but we've had Skype-like technology for ages now and it's only rarely used for video chat it seems, and never on a TV that I've ever seen or heard of.