The question at https://workplace.stackexchange.com/questions/184198 showed as a "Hot Network Question" and I was following it when it was suddenly deleted. Is there a way to understand why a popular question would be deleted? Can the OP delete it after there's significant activity?
Is there a way to understand why a popular question would be deleted?
Yes, you can ask about it on meta as you have done. :)
Can the OP delete it after there's significant activity?
No. The OP can only delete their question as long as there are no upvoted answer(s).
I'm not asking about the deletion of a comment, but the deletion of a question with many votes, many answers, all of which had many comments.
Based on our assessment of this post and several flags by members of the community the question was removed for having been posted in bad faith. (A "troll" question as mentioned in gnat's comment.) The many votes, answers and comments are not a good thing in this case but the result of a fabricated question designed to spark this kind of reaction.