It's not safe. The cops will shoot your boner if they track your photo!! Remember all pictures you post on the internets have your IP address embedded in them once you send to the websites. All ISP's and Police Stations will know where you live. It's all Obama's fault that you're growing pot in the first place and he implemented this hard rule, to get your arrested to make money of the court systems. And Saudi Arabia is funding the Obama administration to put a fix on the medical insurance policies, and the real studies on how harmful marijuana is will be revealed, and a bunch of us will start dying. Then Bin Laden's second in command will start war. Thus showing that in fact Obama was not born in the US and is Muslim! He prays to Allah through your pot pictures you post on the internets!
And as absolutely fucking loony as that sounds... its not nearly is retarded sounding as most of the conspiracy theories regurgitated by the right wing loons and Fox Noise sheep. Baaahhhh bahh baaahhh.
And yea dude. You're completely safe posting images on the internet, just don't be stupid. But if you are the least bit paranoid, look into Tor. Good day.