Doubtless many will wear masks, but not all, and people have a hard time doing any physical work with the mask on. And I think there may be other tips as to individual identity of perps. So, they have something to be concerned about.
“Facial” recognition software AI deals with the whole body including gait, hand positions, total aspect. A mask is not usually sufficient. Even without AI it can be done. Remember that teacher who clocked the anti protester with a bike lock a couple years ago? It was on line people who deconstructed the video of the masked guy and identified him and got him arrested.