Don't upload images into messages unless these images are from your own web page or housed on your own server. Otherwise there are problems with both copyright and bandwidth theft.
Those Tripod things are a pain. Sometimes people prevent you from posting a link directly to the image (deep linking, or hotlinking), because they want you to navigate to the page from their own home page (past all the ads, etc.) Images from most sites, however, can be posted directly, using the command.
You can try clicking on ...fically to stop you from doing this.
Mathman