LineageOS added an irremovable notification saying "your software is not genuine" to Android for April fools. However, they have weekly updates, and I got this notification before April 1st. The only way to remove it was, as root, flip a setting. Needless to say, I and a lot of other users, were pissed.
When the April Fools prank is harmless, obvious, and doesn't affect users, it isn't a big deal. In the above example, has the notification had a dismiss button saying "April Fools", I would have not cared, and probably have been amused. But when your April Fool's "prank" affects other people, then it isn't so funny.
It's not just April Fool's, either. Antd got into a bit of hot water late last year because it was discovered that they included a Christmas theme that got automatically enabled on Christmas and didn't tell anyone about it.
https://lineageos.org/An-April-Apology/
LineageOS added an irremovable notification saying "your software is not genuine" to Android for April fools. However, they have weekly updates, and I got this notification before April 1st. The only way to remove it was, as root, flip a setting. Needless to say, I and a lot of other users, were pissed.
When the April Fools prank is harmless, obvious, and doesn't affect users, it isn't a big deal. In the above example, has the notification had a dismiss button saying "April Fools", I would have not cared, and probably have been amused. But when your April Fool's "prank" affects other people, then it isn't so funny.