Notice that you don’t see any Dem operatives putting on Grim Reaper outfits and riding the NYC subways to warn people away (and more importantly, to raise money for themselves). That’s because a person might actually catch the virus on the subway, which is much, much less likely to happen on a public beach. That’s why New York has 17 times as many virus deaths as Florida.
Seriously: If they thought they could get the virus by doing this, do you really think they’d be doing this?
People are dying, and the Party of Science™ is making a cynical, science-denying joke out of it. Our moral, ethical, and intellectual betters get to safely signal their virtue while making a spectacle of themselves. This stunt is pretty much perfect.