@Daojoan I had a really annoying one the other day. It was a course that my boss wanted me to do, around the use of AI in video distribution. Anyway, the training website was set up that as soon as the window playing the video lost focus, it would pause!! No clicking on other apps while watching this video on pain of pause.
Naturally, I spent a few minutes reverse engineering the website to extract the video and watch it outside of their crap, so that I was able to do other things whilst the guy wittered on about irrelevant Jira integrations.