Once set free to indulge, often the last thing on booze fueled revellers minds is any post "pee'd as a newt" consequences!
Open the flood doors?....then expect the flood.
They can tell folks now until they are blue in the face to stick to this and that social distancing, the horse has long since bolted and left the stable via the newly opened door.
I have stopped listening to any daily briefings Covid advice, it's all either token and glib, or been already flogged to death and then later rescinded on.