DeeDee our DD doesn't have a phone but we had to disable messaging on her iPod because she just could not be trusted to make good judgement calls with it. 50 messages to the same friend asking why they hadn't responded yet, that sort of thing. Misunderstandigs with friends blown out of control. She also has Aspergers and it seemed to me like messaging/text posed issues that phone, FaceTime and email just haven't. Not that she's taken to any of those the way she did messaging...
You don't sound controlling you sound reasonable and sensible.
