I don't know if anyone cares or if this is truly related to anything in this topic, but I thought I'd share a personal story related to the "smile" part of the link Rando gave.
I work at a large company where there is a cafe on site. It's a 10 minute walk just to the parking garage and I only have a 30 minute lunch, so either I get food in the cafe or I bring something from home and go eat in the cafe seating area since the microwaves are there. A few months ago, a new male employee in the cafe was working the register, and while ringing up my food told me "Smile." Ok, fine, he's being polite I guess. I smile. A couple of days later, he's working the food line and while I'm standing there waiting I hear "Hey, do you remember what I told you last time... I said smile." He's still got a smile on his face so I assume he's being friendly enough, even though it's a bit creepy as he's singled me out in a group of like 10 women.
The next week I walk through the cafe to get a drink, and he yells at me from across the cafe (about 40 feet away, with at least 20 something people around) "Hey... you'd better smile." I've been singled out again, and this time it creeps me out to the point that I don't want to be anywhere near him, so I pay and bring my lunch for awhile, avoiding the cafe completely. Then one day I'm just walking through the cafe to go sit down, and he does it again. I pretend that I don't see or hear him. It doesn't work. No smile on his face, cold eyes, cold tone in his voice.... "Hey, hey! I know you can hear me. You'd better not be ignoring me. I told you to smile, and you'd better listen." So, lunches are ruined, but what am I supposed to do about it really, because how stupid does it sound for me to report someone for telling me to smile?
The next week I'm leaving the cafe area and he sees me. I again completely ignore him, avoid all eye contact, try to make myself invisible. Yet he still yells at me across the way, this time with anger in his voice. "Hey, you'd better stop ignoring me. I'm talking to you, and you are being rude ignoring me." My husband works at the same company and was with me but a ways behind me, and walked up about that time. I looked at him with a 'don't say anything, I just want to get out of here' look, which the guy saw, and proceeded to then yell at my husband "Hey, your woman is disrepecting me. You'd better say something to her before I have to teach her a lesson in manners." I get husband and myself the heck out of there fast.
That's the day I reported him. And I was laughed at by the cafe management. Two male managers sat me down and asked exactly what the issue was, as they had instructed their employees to be friendly to people and have conversations. I tried to explain that singling me out and screaming at me from 20-40 feet away and threatening me and my husband was in no way a polite conversation. That I felt threatened, that I didn't want to eat in their cafe at all, and that I'd appreciate if they did something about it. They informed me that they'd talk to him and tell him to stop raising his voice across the cafe, and to leave me alone in particular. I told them I didn't want singling out, not to mention my name or description at all, because he'd already escalated the situation multiple times with me simply walking in that area, and I didn't need to be more of a target. They all but rolled their eyes at me.
He has stopped talking to me, but will death glare me down if I'm anywhere near him. I have to actively avoid one of the main buildings and the only source of food because of this. All because some guy decided to tell me to 'smile' and then get super weird and threatening, and I wasn't taken seriously. And since there are 6000 people here and 80%+ are women, I'd be willing to bet that I'm not the only one that's been singled out, but I know I was the only one that reported him because they were truly shocked (and thought it funny) that I was offened enough by being told to smile to report him.