It's me. Sorry for any frustration! I just disagree with the idea that these comments need to be scrupulously policed. They're courteous and don't get in the way in a substantial way. If someone is carrying on a multi-reply conversation in comments, then sure, too chatty.
I understand, though, that Jeff's official stance is different. I just think within reason, a "thanks" and/or a "you're welcome" isn't hurting anyone. For what it's worth, others have expressed similar viewpoint on Stack Overflow Meta and other Metas.
That said, if you feel strongly please re-flag and I will not decline it this time!
I would be curious to hear other users of this site chime in with how they feel "thank you" and "you're welcome" comments should be treated.