I have no strong opinion on this, but I am one of the people who was (and remains) strong opposed to avatars, and some folks seem opposed to these ‘Sharing’ buttons for similar reasons to my opposition to avatars, and some of the arguments against them are very similar as well, so I’m going to post a few thoughts anyway. So there.
One, there may or may not be some confusion about ‘how the internet works’ from both camps. It’s worthwhile to fight ignorance where you see it, but if you address the low-hanging fruit and ignore real objections, you make a weak argument. The anti-sharers seem to be consistently worried about SDMB’s discoverability: specifically, they do not want to increase it. We have a good community: most of you all (though not me, sadly) are smart and articulate, and if you’ve ever read the comments on YouTube, you’ll know that’s not true for the larger internet. I can’t prove correlation, much less causation here, but it certainly seems to be the case that once Google started indexing SDMB, a lot more posters who .. let’s just say don’t fit those criteria .. started showing up here. Google indexing is helpful, sure, but I’m not sure it was without a price. I am sympathetic to efforts to impose some separation between SDMB and the wider internet.
In anticipation of responses to that last sentence, I’ll come to my second point. The pro-sharing, pro-avatar crowd seems to make frequent use of the Strawman logical fallacy. MsWhatsit, I like you, I really do, but I’m going to pick on you here, since you posted a handy example:
This is what I mean. No one is freaking out that SDMB is linked to on the Internet. Everyone knows it is. You know everyone knows it is. Everyone knows that you know that everyone knows it is. This type of comment only has two effects, both negative. One, the antis spend a lot of time explaining what they actually think over and over and having to assert they actually understand fundamental ideas of the internet. And two, they get defensive, feel put upon and talked down to, and leave the thread. Neither of these is conducive to a productive conversation.
Also, for the record, I still think SDMB is a special snowflake. I’m not sure why this idea is worthy of mockery.