I regularly see people taking pictures of my plane and myself. Also, I'll never decline a request for a photo (even though I have 'lens shattering' looks). If that helps make their journey more enjoyable, brilliant! For the more enthusiastic, I'll even offer them the opportunity taking pictures from inside the flight deck. It's part of the job. Quite amazingly I'll even depart on time. But what's for sure, I bloody well SHOUT at any numpty who says you can't take pictures "for security reasons." And to rub it in, I'll take the pictures myself. I'll also get very unpleasant with anyone who is rude to any of our passengers (who pay my wages). If you can't be polite (even when provoked), you should really get another job.
PM