Often, I experience it as deliberate. There is so much rehashing; if you link to the source, people may simply go there -- especially if it proves to be better than your hash.
If the hash is reversible then it's not a hash!
Reencrypting?... Nah.
(Looks into a dictionary.)
Turns out we already have a word for that. Regurgitating.
The Economist tends not to include links in their articles; no idea why