Hi Carrie,
What itch am I scratching? I could give a lot of answers, including an itch to better understand the pros and cons of different methodologies I see philosophers using, and an itch to see how well these methodologies match up to our best understandings in Philosophy of Mind of how it is that concepts refer to things or kinds in the world.
But perhaps more helpful would be a bit of auto-biography. I got into this project by noticing that Intuitive Conceptual Analysis would be a pretty good methodology if Descriptivism were right. But most of us think Descriptivism is wrong, and I, being an old Ruth Millikan student, am attracted to a teleo-semantic approach instead. So, I asked myself: if a teleo-semantic account is correct regarding what our concepts refer to, then what sort of philosophical methodology would make the most sense to discover these facts about concept-reference? And that's what led me to Pragmatic Conceptual Analysis.
Regarding concepts like GAY, the crucial question for Pragmatic Conceptual Analysis will be: how has it made a difference that we have counted some things/people as "gay" but not others? Obviously a very big part of the answer here is that this concept has changed our expectations about the romantic interests of people -- we expect "gay" people to be more interested in the same sex than the opposite sex, and vice versa for non-"gay"s. And of course, being able to predict who someone will or won't be attracted to often turns out to be very beneficial. So, at least attending to these uses, Pragmatic Conceptual Analysis will tell us to adopt an analysis of GAY upon which men who are attracted to men count as gay, and men who are attracted to women don't. So far so good, I hope.
But you worry that maybe there are some detrimental uses of this concept too. For these to matter to Pragmatic Conceptual Analysis, it would need to be that there is some sort of systematic variation -- that counting one sort of thing as "gay" rather than "non-gay" consistently leads to detrimental effects. If so, then PCA will encourage us to count that sort of thing as "non-gay". (E.g., thinking of clearly straight people as "gay" is surely almost always less beneficial than thinking of them as "non-gay", so PCA urges us to count straight people as "non-gay".) It seemed like the detrimental effects you had in mind wouldn't vary systematically in this way, so I'm not sure they would enter into the calculus at all for PCA. (Or maybe you could plausibly argue that thinking of young kids as "gay" is always more detrimental than beneficial, in which case PCA would urge us to adopt an understanding of GAY upon which it is not applicable to young kids.)
Incidentally, I should emphasize that PCA is just a tool for figuring out which things in the world a concept is correctly applicable to. It does *not* tell us whether or not a concept is worth keeping. PCA can tell us what referent has been underlying whatever successful practical uses a concept has given us, but it might still be that it just isn't worthwhile to hold onto to a concept for such uses anyway. In the paper, I mention PHLOGISTON as a potential example like this. Some fairly radical feminists (incuding me, a few days of the week) think that various gender and sexual-orientiation concepts like GAY do as much harm as good, and hence should similarly be relegated to the dustbin of history. It's not the job of Pragmatic Conceptual Analysis (nor Intuitive Conceptual Analysis for that matter) to make such decisions -- but PCA *can* give us a better sense of who has been benefitting from a concept and how, which can certainly be a valuable precursor to radical critiques of that concept.
-Justin