Expecting a picture of a fluffy bunny? Well ha, the joke's on you. By performing a GET on this URL, you have caused a program to execute on my machine that sends forged email from you to email@example.com, threatening his life.
If your name is Lucas Gonze, then you accept that you take responsibility for this action because you invoked the GET method. Never mind what RFC 2616 section 9.1.1 says.
See this thread in the FoRK archives for the context.