Just off the top of my head (you can see it over there) you could replace the image with a script that dumps the requesting IP into a database or file, though that's a bit underhanded obviously.
Oh and as for finding out if people are hot linking, the only way I really know of atm is via your hosts' stats on your site, which should list every goings on and what files use the most bandwidth and from where etc. though I'm yet to look into it properly however...
Well actually my question was this one:
Somebody posts his image on a message board. It's posted on imageshack and if I right click on the picture I can find out the exact URL.
Now I want to know: Which other sites does that guy visit?
So can I search for other websites that show exactly the same picture/that link to the picture as in
they all link to the same exact imageshack address
because nobody answers me real question so i thought about explaining it better in the hope to get an answer
i didnt want a code to block/disable hotlinking
i wanted to find out how links to a picture and where else its posted