OTK socks with school uniform - is that trashy?

I go to a school where the uniform skirt is short and its been freezing lately so I've been wearing otk socks (alternating black and white) There is nothing to prohibit that in the dress code. My friend is obsessed with a stereotype that otk/ thigh high socks are trashy (or worse evoke innuendo of prostitution - I know, charming!) However my arguments are (1) It's freezing (2) The're just functional, ribbed socks and are the right color for the uniform (We're not talking anything racey) (3) They cover more flesh that the uniform the way most girls wear it (4) Guys increasingly wear their socks otk playing soccer (are they s?) (5) They help redeem an a drab uniform (6) They're one of very few ways to customize the uniform that is allowed. So is my friend right or is her notion judgmental and antiquated?