I work at a university and a guy called this summer to see if we wanted some "dinosaur poop" he found. Maybe he was prank calling, byt he sounded totally serious. I just want to know how he knew it was dinosaur poop? We don't have a paleontology dept so I sent him to biology.
It might well have been worth having a look at it, and his identification could have been correct - some specimens of coprolites are very obviously faeces. He might also have found it in an area where coprolites have previously been found, perhaps even in an area where they were mined (in the past, they were ground up and used in the manufacture of fertiliser - here in the UK, the finest buildings in some villages were paid for thanks to fossilised faeces!)