And thus, stuff like: perma.cc Though it strikes me that with such an extended chain, it'd be better to essentially have ping-backs for each item that referenc

And thus, stuff like: perma.cc Though it strikes me that with such an extended chain, it'd be better to essentially have ping-backs for each item that referenced or used the data. At least with stuff like this there aren't privacy concerns, and it's not a low-level web commodity like a picture. EXIF & IPTC data can show authorship, but can also store location data, and whatever crap you (or your software) decides to stuff into metadata. It pisses me off that tumblr strips metadata, but all-told, it's the best course of action anytime people use your platform to post erm.. selfies.