can you sue hairdressers who cut your hair badly and make you look stupid?

i only ask because there's a woman i see occasionally in town and i'd like to give her some advice.
i've never met her before, but i feel i need to tell her that she looks like she's been dragged through a hedge backwards, thrown into a vat of slime, and been blow-dried by the methane from a cow's bum.

she wouldn't mind, would she?