Whatever your stance on Bush, Kerry, or any of the other candidates may be, this protest picture is awesomely funny.
If you aren't a (computer) geek or even slightly (computer) geek literate and need an explanation:
In HTML there are start tags and end tags for different portions of the website.
For example, <body> starts the body portion and </body> ends the body portion.
So the sign basically means “end Bush”