With reference to a recent HN thread, I wonder if saying "I'm a developer/security expert/working on a classified government project and HAVE to use a special phone" would garner sympathy or admiration and stop the questions.
This is funny because as someone who works on important but non-classified stuff for the government, I do carry around a government issued phone so that I can access my work email/IM anywhere. But, (a) it's another iPhone and (b) I'd get in an awful lot of trouble if I installed Tinder on it. Most people probably wouldn't realize that though.