There's also a lot to be said about what else is in the pictures taken.
Addresses, phone numbers, geographical landmarks or any other location or contact information should not be in one's personal pictures.
I have offered free photo and posting service to owners before that had something they wanted to sell.
Some have taken me up on it to, and as one would expect, they asked "What's in it for you?"
I just tell them a little consideration here and there on prices is fine, but not expected.
You would be surprised how friendly they can get if you give them something that helps them.