Yes there are those who dress without consideration for the culture here. Does that make it right? No, it's still rude. Mostly the Asian ladies are the ones who are approached by security and told to leave/cover up.

I've known Western/European women who were spat on in another GCC country but haven't heard of it here.

Be aware that a lot of the male population here have only seen white women in movies, especially porn. And wearing clothing fit for the beach can be uncomfortable because of the inevitable staring.