I've noticed people doing that (on days where I check new frequently), so I've been curious if that's addressed. It's good to know that it is. :)

The annoying thing about that tactic is that there's plausible deniability for the perpetrator to nonadmins. Well, unless someone is using a Python scraper, anyways.

You're not limited with a Python scraper. Just scrape the comments url, and pull out the id number. That's unique, even if the story url and title aren't.