The Jack Black death hoax joke below

‌This wasn't actually posted by Jack Black on his own social media.
No matter how much I look, there's no trace of that,
but instead, several different versions of the same death hoax photo are being posted one after another.
Apparently, in the US, on celebrities' birthdays,
American netizens post death jokes like that on Instagram and such.
It's a behavior that is truly hard to understand,
but anyway, it doesn't seem like Jack Black was personally seeking attention.