[Pete]

It's not really a hack but it is still genious. I am just guessing but it looks like DU allows HTML in their posts.

The trick shown above could be accomplished pretty easily by putting a onLoad in a body tag with 'javascript:alert('All Your Senate Belong To Us').

When a site allows HTML, another fun one is to do a redirect using the meta tag. When a person loads the page, they are redirected to a website of your choice. Not that I am suggesting anything...

[Cold Heat]

The guy had a little surprise for them if they pushed the button on the tag!

It locked up the screen and they had to dump and log back on! LOL!

[Sir Gawain]

When a site allows HTML

You mean javascript. FR used to allow it. It was fun to do a MouseOver on a link and resize the window to 100,100.