If we had members under 18, I could accept it is limiting future membership, but we really have just one or two, the impact on potential membership would seem to be negligible
Don't we also have like one or two at most people under 18? It's not like its something that actually happens, we get minors decide they want to hang out with people largely in their 30s-50s. Different to a couple of decades ago when we did have many people 14-18.