That sucks.

When you put your work out there publicly; as you have-
I'm sure you know to Prepare for Anything!

Some people will make the extra effort of finding you/your website
from the name on the pdf. If you enjoy the model; why not look for
more by the same artist, right?

I know certain image hosting sites- will not allow hot-linking
perhaps you can research them and find out about the code they use?

something like this:
http://www.shwetagupta.com/blog/2007/11/06/avoid-hotlinking-of-imag...


Hope that helps you

Well whenever i have to talk to the end user about IP issues i always speak in the positive past tense. Like saying

"Thanks for linking this page and not just linking the PDF directly, your page views help my dreams come true!"

If you write like they have already complied i think you get the message across in a kind way. as the majority of people will comply there is no reason to be negative.

I'm quit a nerd about this, but I have a couple of stuff that I do to make sure that nobody hotlinks.

* All my models (templates) are zip files, if you would directly link to this file your browser will start downloading this immediately (this only will not stop hotlinking but then there is no preview of the templates)
* I never give anybody the real location of the file!!
* Then I hide the location of the file with javascript so only people who view the source (for now I seem to be the only papertoy nerd here, because I haven't had any hotlink yet) will know the location.

example:
< a href="#" onclick="location.href='http://www.matthijskamstra.nl/downloadfile.zip'" >downloadfile.zip< /a >
(this is not the correct html code, but npt doesn't show htmlcode)

pro: the location (url) of the file is never shown in the browser, download managers don't read this, no hotlinking
cons: google-analytics don't work with this solution, the page jumps to the top of the page, you need to understand something about html/javascript

It never happened to me, but if someone does menage to hotlink to one of my files, the only thing you can do is send a email explaining that you don't want that. I can't imaging that papertoy blogs wouldn't react to you email.

And if they don't change the link, you can always remove the image at that location and replace it with a message explaining that you don't want hotlinking, that the blog didn't want to listen to you email, blablabla or something like that. Most blogs write about a subject and then never revisit what they wrote, and so they will never find out that you have changed the location of the link.

hopes this helps