I haven’t watched the clip yet. She is kind of undermining that message, but it's her choice to leverage her sexuality. Especially given the context you presented. I thought she didn't like people discussing her body when she dressed more provocative ( maybe too strong of a word).
The reason this action undermines her message real or fake in the past. This will make people rationalize that it isn't a true issue. Now, they'll make more wild shit.
Its wrong ,but you aren't likely to give a stripper a different level of respect just because she's not in the club. Its not even necessarily done out of disrespect. You are use to smacking her on the ass, so you may think she doesn't think this is offensive. For most people, it would go without saying this is only cool in that environment. You shouldn't just assume she is cool with you doing this at Safeway.
Unfortunately, your behavior dictates how people treat you. If you don't want to be sexualized, you shouldn't put that image out to the world. Again, that doesn't give anyone the right to disrespect and she should be able to wear whatever without people being over the top. There is a difference between saying you look nice and saying id fuck the shit out of you.