You have to literally use all of your might to pull the camera off when using 3M double sided tape. We use this stuff at work to hold usb pods to desks which usb sensors get plugged in and pulled out all day everyday. The tape really is probably better than screws. And done more than 30 z's and over 10 cameras with tape I have never had a complaint.
Also the tape comes with the camera ready to install.
May want to watch this video, around 1:20 seconds in.