We keep ourselves to ourselves and ignore anything the neighbours are doing.
So long as they stay away from us, which they do, they're not harming us. Same for you. Anyway, the more people who catch it while we're in isolation the better off we'll be if we do catch it later, with more medical support and knowledge available.
There always have been people who think of no-one but themselves and there always will: looters taking advantage of every disaster, the black marketeers during each war, the people who stockpiled everything they could with no thought for anyone else during this emergency, the scammers who take advantage of the naive... the list is endless.
There are too many people letting a bit of jealousy get the better of them. Reminds me of children all clamouring to have what everyone else has without considering whether it is good for them.
That said, there are definitely people who are off my Xmas card list after this.