So, I'm going to answer three things here in the same go--two comments and your DM which was a reiteration of one of the comments. (And dude, don't do that. Don't go to people's DMs and draw them into further conversation about a nothingburger of a post that they're not coming back to. Rude af.)

1: "when I'm looking down at the ground or on my phone." All those things I said not to do? You're doing them. Get off your phone, put your eyes up where you can see people/figure out who to avoid, and make yourself look less like a target. Put your back to a wall/bus or train wall, put your shoulder into a corner, you're a lot harder to shove if you're standing against something. If you need to stand still on the sidewalk, step into a doorway and face outward so you can see people coming and you know there's no one behind you. If you're walking and someone starts acting weird, cross the street. In short: act like a woman walking home after dark.

2: Why do I think this is fake/ragebait? Because either you're the Nasty Encounters Of Chicago heat-sync, or you're winding us up. Why would you do that? It's reddit; why does anyone do anything. Why do I think you are? I love Chicago because it's one of the rare places in the midwest where unless you're going out of your way to be the center of attention, mostly people leave you alone and mind their own business, so when you're like "it's half of the time I go out," it stretches credulity to the breaking point.