Why should I stop hotlinking?
Hotlinking can have a lot of undesirable consequences. One is the so-called
"switcheroo". If you've linked to an image on someone's server, what's to prevent them from changing the image you linked to? This can have
humorous results. Since most sites, forums, etc. have strict policies about offensive images, it wouldn't take much for an aggravated webmaster you've been stealing bandwidth from to shut you down completely with an unwanted "switcheroo".
Displaying an image or file that doesn't belong to could be a violation of copyright, making you open to litigation. The owner of the file could utilize
DMCA law to have your site shut down and your information given for use in legal proceedings.