Don't parents sometimes tattle on other parents they deem to be irresponsible, according to their own standards of just what children ought to be able to do by themselves? I seem to remember reading some anecdotes here the last time this topic came up.
Not just other parents, people in general. Also in my experience a woman is under much more scrutiny as a parent than a man (e.g. exact same activity -- with dad: "So great to see dad bonding with kid" -- with mom: "I can't believe she would let her kid do that!")