[petercooper]

Notice how it's almost entirely headlines from large news sites posted evenly pretty much every single day.

This isn't an accusation as such but I'd suspect it's (semi)-automated or it's someone who is amazingly diligent and consistent in posting interesting news.

[mpyne]

They're on Reddit too, same general technique and username.

I'm leaning toward the 'amazingly diligent and consistent' theory myself. After all I have like no submissions and tons of comments, so who am I to judge? ;)

[ccozan]

o.O so many points! It doesn't look like a bot, but it has certainly a browser extension that posts to HN with a click.

[DanBC]

There's the HN bookmarklet.

Anyone considering similar extensions could make a visible guide for 80 characters, so submitters don't have to count chars.