Wow. That's harsh, especially for a volunteer group that they are.
What would be wrong with them having a normal user account for commenting?
Honestly, I think its' possible some of the moderators enjoy the "caché" of posting from a moderator account and the supposed "wisdom" and sanctity of their opinion and regard some users might have for their thoughts simply from them being a moderator.
I can promise you people shouldn't have that opinion based upon some of the things I've seen some moderators say, especially on technical subjects - but I'd bet many Mods enjoy that aspect.
Truthfully - I don't really care - I just wish I could ignore them as you can any other user
(again - not their comments toward me about Moderation - just their normal user commentary, etc)