Massive list of protest events this weekend, all of which appeared in the last day due to the shooting in Minneapolis. Lots locally in my area, too. I think people are angry and frustrated, and so far the 1st Amendment still applies here... So people are willing to show their anger and frustration.
Just be aware you WILL be tracked by license plate readers and/or other means, if you are concerned about it. There are multiple Flock cameras at the most popular protest site in our area, undoubtedly aimed at the protest and at license plates of people attending the protest.
404 Media: Cops Used Flock to Monitor No Kings Protests Around the Country
https://www.404media.co/cops-used-flock-to-monitor-no-kings-protests-around-the-country/