People who commit crimes are often wearing medical masks these days.

Before covid, there was the stereotype of criminals wearing ski masks. It would make sense if you were doing a serious crime and expected to be caught on camera. It did require you to commit to looking like a criminal. Now, you can just wear a medical mask, walk down the street, you can’t be identified, you aren’t blatantly criminal-looking, but you can opportunistically do a smash and grab or whatever without worrying about your face being seen.