Decoy popups
You open Twitter and see a notification at the top of the screen telling there are new tweets, click here to show them. You hesitate just long enough that once you finally are about to click it the notification disappears. Great, now you have just liked some random tweet.
The so called user experience and design has produced some really annoying things. The one I'm annoyed almost daily are those disappearing notifications that prompt you to click on them but just as you are clicking one it disappears and you end up clicking something else.