Yea if you're posting pics of fields/warehouses of pot, then you may be in trouble. But that would be moronic on so many levels. Anybody growing less than 50 plants is fine. No doubt they could track you with your IP, but it's not worth their effort.

That being said, don't be the idiot who takes pictures with his face in the goddamn picture with his plants/bud. THAT would be some rather self-incriminating evidence.