It is illegal to blow one’s nose in public.

10.16.090 Public indecency–Accosting females–Appearing in disguise. No person shall exhibit or expose himself naked, or disguised, or in any indecent or offensive manner to any person passing in the public places of the city, or to persons living in the neighborhood, or rudely, insultingly or offensively accost any female, or appear in the streets or…