(I haven't read everyone elses responses, and I will shortly, but first my initial reaction): There are political debate responses and political debate responses; one can discuss policy politely and even, theoretically, rationally. Given that, I think a political debate is absolutely essential before any sociological experiment is undertaken, save for the small scale model of what you are doing to your own children, which others may comment on as noble or foolish but we should have a high bar for interference of. But if you are trying to, say, create a pressure group which coerces toy-makers to have only boys hold the dolls in their catalogues (heard about that in sweeden yesterday) I would prefer the political debate prior to a quixotic quest to rewrite human nature.

In other words, I think the social engineers are more worrisome than the "crazy" people debating them.