So, IMO it should be either allowed or disallowed, not transparently "fixed" yet not officially allowing it.
My opinion too, and I prefer disallowing.
I agree warning and magic fixing is kind of weird. Either always allowing the dot or just a warning and not loading the plugin is fine with me. I'm still curious what future use of the dot was being referenced though, I don't think I understood that possibility, and might have a different opinion if I did.