Our daughter figured out how to beat that. She came up with the bright idea of storing pictures in her camera phone of various places she frequents, so she'd always have one ready to send.
I wasn't about to fall for that one. I usually have her call from a landline when she gets to where she's going, not her cell phone.
We never tried the method, but that wouldn't work for him because his phone pictures have a time signature at the bottom of the screen.