Locking Down your Android - Anti-Theft workarounds

I am trying to lock down my device in order to make recovery possible against the smarter thieves. I have already completed:

Setting up Anti-Theft, including tracking and Premium for additional controls.
Installing Prey to disable power-off on locked. Must unlock to shut-down. (Hold power just resets on locked)
Encryption and all that.

My question is, how do I disable quick access to settings from the lock screen? Airplane mode makes the device turn off all communication, and thus makes it impossible to communicate with, all in a flick and tap!