Some parents, sure, but not parents generally. Clearly, I am a parent and anything I say may be construed as defensive (which it is) and exceptional (which it's not), but not all, or even most, parents are like that. I do not let my kid (who is 7 years old now) go up to strangers and bother them. I never have. Inconsiderate people are inconsiderate with and without kids.
This is off topic but while I am not the most kid-loving person in the world (I like my kid, not so much other people's kids), I do find all the kid-hating and trashing rather harsh and and unnecessary. Not just here on tPF but generally.