Loud pop-ups
I just stopped by Yahoo! Groups and it gave me a popup window that says, in nearly inch-high letters:
IS THERE pornography ON your COMPUTER?
The title bar of the window says "Porn files on your computer? Check now --- FREE!"
I think it's kinda nice of them to look for pornography on my computer for me. I mean, y'know, saves me the trouble of going out and searching the web to find it.