I recently posted some comments to an answer on Math.SE. I pointed out (politely, I thought) some critical errors in the answer.
Later, on my personal blog (which is linked from my profile), someone with a similar username tried to post a large number of comments containing juvenile insults.
The user's behavior on Math.SE itself has not been abusive, as far as I can tell.
Is it worth bringing this to the attention of moderators? Should I use a flag or the "Contact Us" button? Or is this beyond their purview, and I should just handle it like any other abuse on my blog?
I don't so much care about seeing the user punished, but it would be nice to help prevent anyone else from being similarly annoyed by this person.
(I haven't linked the answer here to avoid public escalation, but I can if it would help. Anyway, it's since been deleted.)
Edit: michaelb958's comments below suggest the user has also been posting similar insults on MathOverflow, so his abuse does include the SE network itself. I'm contacting email@example.com and will pass along my logs.