If it's sexist for women to wear revealing clothing, and it isn't, I think, in a free society, howcome women went along with it in the 60's and didn't get verbally or visually or physically raped, en masse?
It is sexist and discriminatory for women to be FORCED to wear revealing clothing whether they want to or not. Uhura, Chapel et al may have been happy to wear that uniform. Cool. But did they have the choice? Was it "Here is the women's uniform, it's a short skirt, wear it or find another job?" Or did they have the choice of wearing pants? If there is no choice but to wear revealing clothing, then YES is it sexist.