I signed up with TED today. Did you ever see that bumper sticker [slash] t-shirt [slash] poster that said "Everyone's entitled to my opinion"? I suppose this is a reaction against that other saying "If I want your opinion I'll give it to you".
And speaking of supplimentary wisdom, I wish that I'd thought of this when I was asked (by someone 20 years my junior!) hadn't I heard about "not hanging out the dirty washing in public"? The circumstances you can guess at, but if I'd been in a different frame of mind I may well have countered with "is that like sweeping the dirt under the carpet?".
Ah well. Yet more of l'esprit de l'escalier.