There's another quote of WTP I could give in this connection, but I've used up my quote quota for this month.
If you share it in a multiply nested reply to another comment then it is not included in the 'quote quota' - it's just the same as including a quote in any other conversation.
(ie. Your interpretation about applying to social rules rather than morality and ethics themselves seems right and I am interested in hearing the quote you have in mind.)
Ok then:
...If you happen to believe that people ought to live all bunched up together, be nice and refrain from violence, keep their promises and commitments to each other, take care of the helpless, do their share by helping with the unpleasant or boring jobs, teach the young, love truth, and be respectful of the environment, that's fine. What you should do is go around talking to people, trying to persuade them that they will be better off if they act like this, explaining to them the advantages of this kind of behavior toward others and the disadvantages
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.