FM75, on 2012-December-10, 22:22, said:
The opponents will have a very hard time staying out of trouble opposite even as little as 21. Won't they get there even against any standard system? There danger is when opener is just a bit strong, because neither opponent has much of a clue as to their strength - CRO is about shape.
While others in this thread have stated that they essentially ignore intervention, you mention "danger" for your opponents. I want to develop my inner sadist. How do you punish people for butting in?
you: 1C (strong hand)
LHO: 1S (no info and possibly no cards)
partner: X (from what you wrote earlier, 5-8 hcp)
you: ? (you and partner know you have majority pts but nothing about other's distribution or a fit