If you do things with other people and their children, there will often be an opportunity to see that there are many types of people in the world, with many different ways of being, and reproducing (through_ parenting ) those ways of being.
You can either get really wound up about it, blame them for raising children that lead yours astray, get fed up that their approach to life (and parenting is different from yours, etc., etc. Or you can be fairly tolerant, and just think "Aren't we all so different? Isn't that interesting? Wouldn't life be boring if we were all, exactly, the same."
I find the latter approach is good for my blood pressure. Other people like to shore up their fragile self-esteem by assuming that anyone who does things differently is failing and inadequate in some way. Some people take every instance of difference as profoundly threatening and an indication that they are crap. I'm sure there are other approaches.
What was this child doing? Teaching your children to smoke crack?
Well, I'd say ease off the accelerator, because you're going to have to pace yourself - if they're 3 and 5 now, you have some years of this sort of thing to look forwards to.