I seem to have spent the day embroiled in debates about political theory and related matters on three different sites at once. That's not a productive way to use my time, so I must stop doing it. For the record:
1. I don't think the "New Atheists" want to ban religion, as opposed to criticising it. If they did, I'd be on the front line defending the rights of the religious.
2. I'm not disturbed at the idea of a bogan wearing a combination of pajama bottom, T-shirt, and slippers in a supermarket. I find it mildly amusing as a style of dress, but I don't think it's a breach of the social contract that should be punishable by law. Nor do I approve of supermarket owners banning this sort of attire on their own private property, though I acknowledge their legal right to do so (and don't wish to remove it).
3. I don't think that polygamous (including polyandrous, communal, etc.) relationships should be banned by the state, but I don't necessarily think that they should be able to be registered as formal marriages. Admittedly, I don't necessarily think that any sexual relationships should be able to be registered as formal marriages. I'd prefer the state to get out of the marriage game entirely. But if the marriages of heterosexual couples are to be eligible to be registered in this way, with a standard package of associated legal rights, there's a compelling argument of fairness for doing likewise for homosexual couples. Groups larger than two are too varied for a one-size-fits-all set of legal rights, so there's probably good reason to leave their entitlements to the flexibility of the general law. OTOH, I would be fiercely opposed to any attempts to prohibit such relationships outright.
All these positions seem reasonable to me, but it's marvellous how I can get tied up in defending them against people who see things differently.