It's cool to do these to your friends in High school, but I once wasted a good amount of time at work because of an April's fool joke. I already didn't want to do the work so I got really upset to have wasted time doing something boring and useless.
Additionally, the scale of social media can create situations where it wastes everybody's time several times per day... Including on HN.
Feel free to prank your friends, but don't bring it to work or the Internet, please.