I agree that the crowding does not look good, but the posts made it look like one long parade. Upon second look they are all mini parades, and the crowd watching each on is mostly different, though clearly there are persons that stake out a spot to record all the individual calavades.
I take some comfort that while there is some crowding, it is still not on the level of a presentation of Festival of Fantasy. These look more like 1 person deep, and shoulder to shoulder, and for far less then 15 minutes. So the chances of you standing next to the same asymptomatic person for over 15 minutes watching these calvades is slim. Where a mask, and try to pick a less busy spot. Lib square, town square, riverside of frontier land