"but everyone says forcing a child to stay masked for 3 hours is a logistical impossibility," - Just a little personal experience. At the beginning of the pandemic, my grandkids (ages 4-14 then) all had a tough time with masks. Within a few weeks, masks were no problem. They kept them on all day at school this year - even on the playground. I think for most kids (and adults) if you make a big deal out of masks, it becomes a big deal. As far as vaccinated/unvaccinated sections - I would NEVER take my grandkids where they had to sit in the unvaccinated section. The Knicks required vaccinations this year. For those who couldn't be vaccinated (mostly kids), they required PCR tests within a day or so of the game. I didn't hear of any outbreaks attributed to the events. So I totally agree with your conclusion.