Back in the 70's we had a graduation party, no parents, full access to house, pool, etc. Beer was flowing, a few couples making out on the side, a few crazies, probably a few joints of pre-THC mj (you know the type you needed an LP to separate seeds, stems, and leaves). But hey, it was the 70's; we WERE a bit more responsible overall. No cops needed, nobody got into accidents, that was pretty much the norm everywhere, at least in suburbia.
Nowadays, with kids going nuts, porno scenes in every room, drinks flowing like water fountains, THC, crack, and other drugs, all girls half..or more...naked, fights with neighbors...this ain't the 70's anymore. Not gonna happen on my watch if I had a kid. Double standard? Perhaps... but the difference is the culture.