It would be funny if nobody dies but this was just a test if you are capable of large scale coordination - and everybody who presses red just looses their vote in society.
Becomes more interesting if, whatever the outcome, choosing red somehow removes the ability to perform manual labor.
Yes, isn't that always the excuse? "The others are bad so I'm justified in being bad".
But seriously, I am way more uncertain than I first thought. Basically the only reason to choose blue is because you know that a lot of people will do it, so that in order to save their life you choose to put yours at risk.