Many GPS packages for smartphones (I have TomTom) can be programmed to snag the GPS data from a picture automatically and give you directions there. So if I want to be able to get back to some place, I just take a picture of it and use it to generate directions, without even needing to know the address.
In any event, 4chan (and even sicker places now that 4chan is if not respectable at least more approaching mainstream) is like a moat full of sociopathic, high IQ piranhas. If you even post a normal picture, some wacko will try to track you down just for the hell of it. If you post a picture of you doing something incredibly stupid, you will get dozens of people tracking you down. If you are beyond incredibly stupid and post something with embedded GPS data, God had better have mercy on you cause these fuckers will not.
However, even without GPS data, it is eerie how a large group of determined people can find someone from the tiniest clues. It is also funny how a group of people, who often pride themselves on being virtually psychopaths and committing heinous acts against random strangers for little to no reason, become absolutely outraged at someone abusing a cat or a dog.
Google "Dusty the Cat" for just one example of how animal abuse was avenged.