It's interesting to see how that comes across to you. When I include links one of my motivations is actually to towards less exclusiveness. Something along the lines of "I'm using this term but acknowledge that it is in group jargon. Here's the several pages of text I saved reproducing for anyone who wants it." I usually associate the in group status game with making it difficult to get information and so ensuring that you can gain status through every piece of knowledge the newcomers must aquire.

When Eliezer does it, I interpret it as a desire not to repeat himself. When other people do it, sometimes my first impression is that the person is implying they are better-read and more knowledgeable, i.e., that they're trying to signal superior status by implying "I have been here longer and know more," as well as implying a stronger in-group affiliation, by the amount of work they've done to dig up appropriate scriptures and link to them.

The tone of the non-linked portion of the comment of course makes a big difference, of course. "Have you read XYZ? It seems to me like what you're saying contradicts point Q; how would you address that?" would be a lot different than some of the comments I've seen that look like trying to win an argument by the volume of their citations.