Websites with ads that TALK to you.  I play music on my computer while I surf.  If your website has a talking ad, expect that I'll close it before I even have a chance to read it, because it's not worth my time to try and figure out how to shut the fucking ad up.

I want the internet to use its inside voice, basically.

Websites that want you to take a survey so they can suck up your demographic info -- for free. If you want me to take a survey, you'd damn well better enter me in a drawing for a gift certificate or something, or give me a special coupon. Why else should I do your work for you?

Websites that resize your browser window, and/or websites that insist on popping up a second piece of their website in their own window.

Who thought that was a good idea?

While I'm on the subject: links that don't pop up in a new tab. Especially on link-heavy websites.