I'm wondering why certain apps have control over camera/calls/messages.
Why Chrome needs control over camera? Why in the hell would Dead Trigger need control over camera?! Why Facebook have control for calls and pretty much everything? Why IMDB needs GPS info? Etc...
I just checked these on from Google Play.
Dead Trigger does not need camera permissions. If your copy of this game does indicate camera permissions I would be suspicious. Did you download it from Play?
IMDB only needs approximate network based location info, not GPS, which I would assume it needs for its showing near you feature.
Chrome probably needs picture and camera permissions for when uploading to photo sharing sites.
The FB app does a lot of things, like taking pictures, sharing location, auto-login to FB so it needs accounts, probably needs calls permission to knows to quit when your receiving or making a call. I very rarely us FB myself, and just use their mobile site and not the app.
If you have any more concerns about possible suspicious permissions, post them here, or you could even contact the devs concerned and see what they have to say about it. Sometimes devs can be lazy and turn everything on.
Here's one I'd be suspicious of,
which is for wallpaper, i.e. an app that's only supposed to make your phone look pretty.
Your location
approximate location (network-based)
precise location (GPS and network-based)
Network communication
full network access
view network connections
view Wi-Fi connections
receive data from Internet
Phone calls
read phone status and identity
Storage
modify or delete the contents of your USB storage
Bookmarks and History
read your Web bookmarks and history
Your accounts
find accounts on the device
System tools
modify system settings
test access to protected storage
Affects battery
control vibration
prevent device from sleeping