I think instead of inviting people to our weddings the cultural norm should be to invite them to our divorces.

Could be constructive if those divorcing had to explain what went wrong -- give those in the audience considering marriage a more realistic idea of what it entails in day-to-day life, and perhaps giving the divorcing couple some insight to the unrealistic expectations they had which led to the divorce. Not that there aren't legitimate causes for divorce, but so many people (of all genders) seem to treat marriage as a disposable binge fad for a few months these days. They rush in and rush out without ever coming to grips with what it entails.