Sjs, The larger problem is the outright violations, not “just sensitivities”. That’s all of our problems. a. areivim zeh l’zeh b. it causes others to sin (which is perhaps the worst sin itself).
646, No, you can’t not look when crossing the street. Or driving. Or 100 other scenarios. And just the act of having seen an improperly clad person is a sin itself. Hihurim are human nature. It can’t be avoided. It it doesn’t occur, I suggest a doctor.