I would never suggest that anyone intentionally (or unintentionally) break the law / rules and I am not intending to suggest the following as a means of avoiding getting caught doing so, but but I'd think posting a photo without any other "incriminating" details would not be enough to get someone in trouble.
Without any image details (or someone explicitly saying, "Look at this photo I, John Doe took yesterday at such and such place at such and such altitude!") if you strip out the image details (for instance opening the original image in editing software and then re-saving as an entirely new document without the original metadata) then the photo you post could have come from just about anywhere. Maybe you found it on the web and re-posted it. Maybe someone you got it from told you he/she took it, but was lying. I don't think an official stumbling across that photo on the web could derive enough information to definitively suggest who might have flown illegally in order to take the photo.
If you post the photo as posted above, it does contain all kinds of information in the metadata (I have no idea who Jose is

). It shows when and exactly where the photo was taken (Lat / Lon) and even (theoretically) the altitude the image was taking at: "203m" ASL and "162m" relative to where you took off from (If I am understanding how DJI writes the metadata). But I believe those numbers were generated by GPS, which, if you read around the web, you will see may be highly inaccurate for altitude measurement. It may have been recorded by barometric sensors (which can change reading with temperature) or the ground sensors (not really if above several meters) or a combination of all three (again, not entirely sure how DJI computes altitude). Basically, I'm not even sure those details would be good-enough to stand up as evidence that can prove anything specific just by stumbling across a photo on the web. (Not to mention, someone could even alter the metadata with fake info - perhaps someone wants to impress their significant other by saying they flew at 2000ft!)
Again, I wouldn't go about flying where you're not supposed to (and if you knowingly did, it's probably best not to share the photo on the web and gloat about it) but realistically, I think it would be very unlikely anything would result from it if someone did.
J