The thing that gets me, as discussed in this thread, is that the solution is often just super easy. Literally just pop up a modal when the recipient list is above 1,000 users that says “You’re about to send this to X,000 users, Are You Sure?”
Adding that check to every incoming comment in a large scale system and adding the previously nonexistent interactive UI for it is far from “super easy”. This is not a Todo MVC. There must be a thousand higher impact stories that are better targets of engineering time (unless this form of trolling become a new pastime).
In addition, there are lots of actually malicious skids you can’t stop by asking nicely.
Would have totally avoided this situation.