Not really, but occasionally the accounts are so similar that we can tell they're related.

Which ones are you thinking of? If you don't want to specify usernames here, emailing hn@ycombinator.com would be appreciated.

Well it's hard to name them because the names keep changing.

There's a few that are just going for random letters, and simonw's stalker seems to pick a new name for the moment, but isn't really dedicated enough to match Simons volume, so they can get a bit lost.

I guess it would just be reassuring to think that they number very few.

I'm afraid there are multiple simonstalkers. He holds up rather well under it all