edby, I don't think this is a job for the Flat Earth Society. In my personal life, I already do some work to try and make an impact on higher education (like you, I also don't focus on RE vs FE, but rather on independent thinking and the students' ability to solve their own problems without becoming overly dependent on authorities). It's but a drop in the sea, but hey, it's something. I strongly doubt that bringing the FES badge into these efforts would help - rather, the siege mentality of the establishment would act to everyone's detriment.
The FES are doing great at engaging the media, and those directly reach a very wide audience. Those who cannot be taught respond with mockery, sure, but for every however many scoffers, we get one or two people who realise the benefits of our way of thinking. We might not be able to single-handedly fix the world, but we're still happy to contribute.