I can use a .htaccess file to prevent other sites from hotlinking to my media files through conventional means, but they can still hotlink via an SWF file, such as a Flash player. How can I prevent ALL other sites from hotlinking through SWF files (not just Jeroen's, but all of them)?
I first found out about this type of hotlinking when one of my files was hotlinked by Playlist.com. I've set up my own page to test it out for myself (and to also know when a "cure" works): http://1shop.bravehost.com/222.htm
I'm testing out a few different hotlinking methods on this test page. The SWF hotlinking test is at the bottom, right below the "MP3" text.
On this test page, I have a SWF on another site (1shop.bravehost.com) linking to an MP3 on my Ghostbusters site (www.ecto-web.org/~spookcentral/) and as you can see, there's no problem playing the MP3, though a direct link to the same MP3 is rightfully denied.
Ideally I'd like to find a cure that not only works with Playlist.com, but I'd want to set it up so that it would prevent ALL sites that aren't mine for hotlinking to my media files through ANY means.

best way is to change the folder name and not allow a folder scan. Draw back is u need to change the playlist url's
prevent a folder scan on your directories.
the flash player hides the underlining URLs