Assuming the pool has sufficient chlorine, their derpery won’t result in spread as wildfire as on land.
With that many people, you’d have to swim in bleach to deal with the microbial load.
Disgusting.
When I was a kiddo we went to a state park one Memorial weekend. The pool looked just like that. Friends and I went in anyways. We had those swim goggles and some ‘fetch from the bottom of the pool toys’. Played all afternoon. Had a blast.
Had a stomach virus for the next week.