If you are locked and you set off the "groin check", you will get a pat down, you are then at the mercy of the TSA agent. They may take you to a private area for a more through inspection. I have seen this happen. This is a burden to the TSA agent and they might not appreciate. A silicon or plastic device will likely not set off the metal detector BUT the other scanner may flag it as an anomally. Remember, not everyone has evolved yet.

If you carry your device in your check-in luggage, and TSA needs to review the contents of your bag. Try to keep it in a small pouch that they can look at discretely. A little black felt bag works nicely. I have had that happen and the agent was appreciative.

On another occasion, the device was in a clear plastic bag, the TSA agent lifted it enough for the two of us to see and said while pointing "The bathroom is over there, I best see you go over there next" (I did). 

Aside: Generally my bag does not set off TSA scans unless I have a large dildo in it. I've had an agent warn me regarding that. I've had others tell me that has never happened to them.

My advice, receive permission to unlock right before leaving the for the airport. Pack device in carryon (discretely). Reenter device in airport bathroom after security. Photo evidence sent to keyholder. You may need to use a temporary lock (one of the tagged/numbered zip ties)