ASK DN: What's the worst designed feature out there?

over 9 years ago from , Front-End Developer at Trunk Club

What's a feature that--as a designer--you consider to be so bad and toxic in a product and/or a design that you can't even resign to call it a useful tool for a designer?

For example, parallax scrolling effects; some say "useful concept when the situation arises," while some say "kill it with fire."