The way FB parenting groups become a competition about who can do the method the best and become full of virtue signalling hounding judgyfuck bullshitters.
Like you'll get a weaning group where it starts off as baby led weaning encouragement and ends in sad faces any time there is a mention of a spoon as though it was an instrument of torture. Or a car seat group and people take delight in pointing out everything wrong with every picture ever posted even if it's fine. Or a safe sleep group laying into somebody because they left the room once for five minutes before the baby is six months old. It's exhausting because you start to internalise the mindset of the groups and overthink every tiny decision. That's not healthy or constructive IMO. Also I bet the worst offenders polishing their own halos do all of the "wrong" things themselves because nobody is really that uptight.
Another thing that sort of annoys me is the way that certain words become "banned" or people know they will be judged for using them so they pick up an alternative except they use the alternative exactly the same as the old word, even if the meaning is not the same.
For example people know they are not supposed to use the word punishment so they use consequences instead in a really nonsensical way, and then recently even consequences isn't good enough, you are only allowed to give your child natural consequences. I read someone's description of not letting their child out because they hadn't finished their homework the other day and they called that a natural consequence. It's not even the same thing, the whole definition of a natural consequence is something that happens whether the adult is there or not.
Or they read that they aren't supposed to use the word naughty so instead just start referring to "silly" or "not very nice" behaviour. Just use naughty! The whole criticism of using naughty in the first place involves not using any alternative because it's the whole concept of naughty/good that is the problem, but this gets missed and turned into a sound bite of "don't say naughty or good boy/girl" without any of the useful info behind it.