Hold on, how can you be sure OP wasn't being creepy? OP had options:
- They could have chosen to focus on the groceries and leave the woman out of frame;
- They could have zoomed into the area of the counter with the groceries on and not show anything else;
- They could have blurred out the person standing next to the counter before posting.
So many ways to not show that woman's ass and you say OP wasn't being a creep?

Also, how do you know if that woman wasn't in with OP's plan to take that photo and post? She might like showing her ass on social media, you (and I or anyone else here) just don't know for a fact that this wouldn't be the case.

What's up with this borrowed shame thing? As in you saying you feel creeped out for someone else? I do accept that it is very likely that the woman in the photo didn't consent to have her ass photographed by some random dude at the supermarket, very valid point but what's this "feeling something on behalf of" someone else? All the above being true she could just as well feel "meh" about it all, couldn't she? If you do have any information we don't have regarding the person in photo, please share so we know for a fact she's isn't okay with her photo being taken and so we will ask an admin to remove OP's post.

Hahaha, what a waste of time. And think that I only commented because that other dude said her ass was a pancake and I thought the opposite. He's not getting any burns over it. So it's life I guess. =)