Aw, that drives me nuts! I've scanned thousands of photos and nothing makes me more sad than finding a picture on ancestry of a close relative that I've never seen, but their tree is on private, and they don't respond to messages. I'll admit I have private trees (mostly because information on their I believe is wrong and I don't want other poor people copying it!) but if someone emailed me to ask for a photo I'd be all over it.