Take pictures with your device' camera (front or back) as an action with AutomateIt.
This plugin adds a dedicated action to AutomateIt to take pictures using your deveice' camera.

Pictures taken are stored on your SD card at the standard pictures folder (Usually /sdcard/Pictures/AutomateIt) and are instantly added to your gallery under the "AutomateIt" album.

Try this plugin with the following rule to see who uses your phone when you are not around:
http://automateitapp.com/rule.php?id=27255

To use this app you need to install AutomateIt Free or Pro.
Screenshots shows how the plugin is used within AutomateIt