Jmatt:
I agree with you, to a point. I am not saying that you should do stuff that you are not comfortable with. That is a decision that each person makes by themselves.
However, I respectfully disagree with you and stand by my words. We should NOT ban young couples (not families but couples) from having each other over as guests. I believe that it builds a sense of community, friendships, and support system that will be there for years to come.
My parents have friends who they don’t talk to on a constant basis but whenever they need something, or need to stay over for shabbos for a simcha, they do not hesitate to call them., This is due to the friendship that they forged when they were all young married couples.
I am sorry to say, but not all innocent activities lead down the road to disaster. If you are not strong enough, or you do not think your marriage is strong enough, then do not have guests over. But there should not be a blanket ban, as those that are suggesting, because of a select few.