It's not very difficult to download. But if you post someone else's pictures on another site, you are opening a big can of worms - legal worms if you don't have permission. Beyond the legal stuff, it's ethically very questionable. I would not recommend it.

Of course, you realize (I hope) that there's nothing preventing someone from posting your pix elsewhere. It's a risk (or a benefit depending on your view) we all take. Once your cock and balls are out there, there's no getting them back!