What is your pet peeve invention?

In other words, what iinvention out there though it is a good one makes more problems and takes more out of you then it is worth having sometimes. For me it is HANGERS. They tangle, wrap themselves around each other, get messed up even when hanging with clothes on them. You try to get one off the rack and 20 come with it or it snags on a few of them and the entire bunch comes crashing down. Then try to pick just one up.... hahaha. You can't be civilized in actions or words with that invention. It's the best invention for helping you LOOSE YOUR COOL in my opinion. What's Yours???