2009/9/16 Hay (Husky) <huskyr@gmail.com>

Because it's not the server of the website that loads this url, but
the users browser it is a bit difficult to see if an image is actually
hotlinked, although it can be prevented.

-- Hay

What about adding/editing some basic EXIF data (author,licence) into uploaded Commons files that support them, like jpg? They can be deleted by a malicius user into downloads, but they will be saved when hotlinked. I don't know if any EXIF managing is currently done on Commons files; IMHO it could be useful, for a number of reasons, and not only for hotlinking.

As a "hotlinker" (far from a very active one), thanks for your comments, as I told you I use hotlinkg mainly into "volatile" communication tools like forums and not into websites. It would be great if an informative box would be added to File: page, containing a brief mention to general Mediawiki politics about hotlinking and  the html code for a correct hotlinking, if really needed.

Alex