Obviously it doesn’t look great but I think the experience with the various protests over the summer (despite looking, I think no one found significant increases in cases due to big protest marches in the US) suggests that this is reasonably benign, though maybe it’s worse with the new strain. In particular these people outside where the ventilation is good are not huddled together in bars or restaurants or sitting rooms with their friends/family which is a much more reliable way to spread the virus.