I agree with that policy. In the Acadian Project, if there's a popular theory for the parents, but no evidence, I'll link to them in the bio, but disconnect them from the profile.
My question is, for the totally fanciful ones, what do we do with those profiles? I hate the idea of them floating around disconnected. Like in the Acadian Project, there are tonnes of women named things like Unknown Mikmaq Woman, attached to various families, with no evidence. I'm thinking of merging them all together into a profile that contains a discussion about them or something.