What's with all the trivial link spam?
jasonkester: If you think about how you'd build a script to spam Hacker News, it's easy to see what's going on here.  - Step one is getting your bot to reliably create accounts.
  - Step two is getting it to create accounts and post links.
  - Step three is feeding it a list of 5000 of your sites.

This bot appears to be at step two.