I have a pump and usually they don't care or even notice it in my front pocket. I have been stopped 3-4 times though and once the idiot said I had to get the pat down. I made a big enough fuss that I didn't receive a full pat down and the TSA guy checked with his supervisor to see if he had to give me one at all. I guess got to him enough that he didn't want to bother.

I will not go through the xray machines with my pump and I'm not taking it off. I don't know what it may do to the insulin, but I don't think it will do anything helpful. I'm sure the TSA also hasn't tested it, so I'm not going through it.