XiXiDu wasn't attempting or requesting anonymity - his LW profile openly lists his true name - and Alexander Kruel is someone with known problems (and a blog openly run under his true name) whom RobbBB might not know offhand was the same person as "XiXiDu" although this is public knowledge, nor might RobbBB realize that XiXiDu had the same irredeemable status as Loosemore.

I would not randomly out an LW poster for purposes of intimidation - I don't think I've ever looked at a username's associated private email address. Ever. Actually I'm not even sure offhand if our registration process requires/verifies that or not, since I was created as a pre-existing user at the dawn of time.

I do consider RobbBB's work highly valuable and I don't want him to feel disheartened by mistakenly thinking that a couple of eternal and irredeemable semitrolls are representative samples. Due to Civilizational Inadequacy, I don't think it's possible to ever convince the field of AI or philosophy of anything even as basic as the Orthogonality Thesis, but even I am not cynical enough to think that Loosemore or Kruel are representative samples.