YC - calling on you to take action and hold Garry Tan accountable.
Also, while I don't think that a serious threat was intended in this case, there is absolutely no logic to the idea that something cannot possibly be construed as a threat if it's a quotation from song lyrics.
But, I mean, calling this "disgraceful" is narratively a lot more fun than just acknowledging that social media affords us all the opportunity to faceplant publicly with age-revealing pop culture humor. I'm sorry to be captain fun vampire, but the narratively-most-interesting interpretation of a story is very rarely the truest.
In your second paragraph you seem to suggest that I only hold my point of view because it makes for a good story. That seems a bit patronizing. Perhaps in return I could offer my own diagnosis: that you spend a lot more time on Twitter than I do. Maybe this stuff starts to look 'normal' once you've been in that particular bubble long enough. All the more reason to stay away, in my opinion. If I ever start drunk-tweeting death threats at members of my local government, then I hope that my friends will not run to my defence but make it clear to me that I have a problem.