He created a new account to troll. It's an ugly trend; while it's minor, HN has a bit of a problem with this sort of thing. I assume that 'dang and 'sctb are on the case when this arises (and I flagged the post because of it), but it's probably a hard one to solve.

The solution is already in place - don't engage with them, just flag their comments and leave them alone.

The mods are alerted whenever a comment is flagged so they can get around to banning those accounts eventually.

It's more that their actual accounts should probably be shown the door for that behavior.

Nobody's tripping onto HN, seeing that post, and signing up to shitpost.