You can use a web based mdm. They general cost money. Follow this discussion for low cost MDMs.
Register more than 10 iPads to same apple ID for school or business?
This will be a pita. You can get 30 apple ids. Be sure to enroll them in with an apple id.
Activation lock
Find My iPad
"With iOS 7, Find My iPhone includes a new feature called Activation Lock, which is designed to prevent anyone else from using your iPhone, iPad, or iPod touch if you ever lose it. It starts working the moment you turn on Find My iPhone in iOS 7."
http://support.apple.com/kb/HT5818
"Deploying a great quantity of iOS devices means creating a great quantity of Apple IDs. This script allows automated Apple ID creation from a spreadsheet."
http://www.enterpriseios.com/wiki/Apple_ID_Automation_Builder