Actually they did when they posted their names and photos publicly to the internet. "Public" doesn't mean only the people that you like.

Edit: Additionally, I find your "people like you" statement hilarious. You know nothing about me, you're upset that these parents were publicly identified, and you assume my motivations (completely incorrectly.) When something is PUBLICLY posted, that means there are NO restrictions on who sees it. Consent is not qualified by "oh I posted it publicly but not for this group of people I don't like." Public means everyone. Had they posted it PRIVATELY, you'd have an argument. But they did not, so you don't have a valid argument, you're just upset. There's a difference between the two.