You make it sound like a childrens' party, but my experience from living on an island with a notorious beach resort (Kavos, in Corfu) is that people drink way more than they can handle, vomit everywhere, assault someone, break something, get in a fight, injure themselves or others, pass out on the street and leave a horrible mess of trash, sick and piss behind them.
And often don't even know where they are, literally, because they boarded their plane already off their tits and went back with three months' worth of hangover and never had the chance to visit places or see sights, or anything else than drink themselves blind.
Covid just puts the risk of spreading infection cherry on top of the public nuissance cake.
https://www.theguardian.com/world/2012/apr/07/vang-vieng-lao...