I have cancer and I still wear a face mask everywhere due to a compromised immune system.
I also get very cold with my disease/medications. My blood circulation isn't as good now. I can be chilled when its 77 in a room without a sweatshirt. My hoodies aren't black but they are dark blues and greens.
Further, I have serious skin issues and always have that lead me to keep my hair always cropped very, very short. Meaning when I am chilled like that, I often have the hood up.
I am not here to make judgment on your position but rather just a reminder of valid reasons things like this might happen that don't involve others meaning you bodily harm.
I am a big guy, and sometimes it feels a little tiring to have the default be everyone is scared of me despite my inability to defend myself before I had cancer. I don't own guns or knives and my backpack is either full of groceries or PC maintenance equipment.