We can ask Vlad if it's an option on the new software we're planning.
Unfortunately this has been an issue since the birth of tPF. Anytime pics are posted online there's a chance they'll get swiped, often even with a watermark!
There's free watermark apps but even if you post "for tPF only, not for sale!" in huge font across the photo, they'll still do it.
Completely, though it would be great if it could be added in some way to the photo software, at least we can reduce it even a bit with watermarking, sadly it'll never be 100% stopped.
Thank you!