I think it would really help both in terms of outcomes as well as the perception of police if they gave this kind of clear description of what's going to happen. As it stands now, the curfews aren't enforced with any kind of regularity, so they just cause confusion.
As someone who has participated in protests for 5 out of the last 6 days and was tear gassed, I can tell you that protestors are much more peaceful when the cops keep a distance. Once the armor shows up and the tear gassing starts protestors get angry.
I've watched videos of peaceful protestors getting shield bashed by police which causes them to get really angry and then they get a beat down for being angry about it. It's a pretty human response to get angry when someone gets physically aggressive towards you.