In terms of feminist theory, this is definitely true - perpetuation of sexism in language through slang and memes is undoubtedly harmful. (and theory aside, it's a matter of experimental record that language affects thought, to a certain extent.)

Sadly, my subjective brain still likes the ring of the phrases. "Science: it works, earthlings!" sounds just a little too geeky, and "humans!" doesn't seems to ring true either. And "Children, please..." irritates me from an age-discrimination perspective (I'm a firm believer that if we patronised our children less, I'm sure there'd be less extremism and fundamentalism in the world.)

curse my sexist, subjective brain! :/