Loved the post you linked!
I second your hesitation about the upside/downside to “identifying as an EA”. But I honestly don’t think you can help this sort of thing happening. The most you can do is actively guide the values that are defining your group. In the early days of the neoliberal subreddit (the earliest large-scale group of modern self-identified neoliberals), one of the slogans we used was ‘evidence based policy’. The leaders and prominent members of the subreddit tried to instill ‘evidence based policy’ as a core value to the members, to offset the dangers of groupthink, to make people be willing to change their minds. EBP is a complicated subject and it’s not like most people are really out there reading research papers. But it’s important to at least have people signaling that they are open to changing their minds. Signaling can become reality.
You might be partially right, but in the early days we were largely memeing about free trade, immigration, and semi-ironic worship of central bankers. Most of that isn’t exactly the hot thing with the youths, but never underestimate the power of memes to make something ironically cool in a subculture.