Evil Web Design
A gynormous pet peeve of mine: links on web pages whose text changes size when hovered over. When they’re in some sort of menu, the effects are often only aesthetically vomitous. But when they are inside a section of text, they can change the layout around far too much to be able to not piss the ever living daylights out of me. And when I piss everliving daylights, I get angry.
I put web designers who commit such crimes somewhere between the 6th and 7th circles of hell.