Between blotch and blok

But that presumes that having the interesting participant on the panel or at the party suddenly depart the room, leaving everyone else bereft, is only inconvenient to the woman who had to get up and leave.

I beg your pardon? I'm not following you at all there. I wouldn't expect anyone responsible to take a position on a panel if they knew they were very likely to be interrupted part way through, whatever the interruption was made by. Feeding a baby's no different to answering a mobile in terms of the simple rudeness of disrupting a formal social situation. And party guests, for goodness' sake, are grown-up enough to amuse themselves for ten minutes.

the solution required by strict etiquette is to neither look nor nor comment. Simple.

Sorry, I'm not following that either. You appear to be saying that I should just repress and ignore the fact that seeing these things makes me uncomfortable, and allow the parents of future generations to violate my sense of the sane boundaries of intimate relationships if they feel like it. I thought I was engaging in a productive discussion about the underlying issues and expecting parents to be farsighted and responsible just as I would other adults.