Yep very possibly lasterman. There will certainly be plenty of irresponsible folk to factor in. To assume everyone will toe the line at this stage would be bit naive. There is also the herd immunity argument where it could be a good thing if a lot of non vulnerable people get it and shield the more vulnerable. Old folk need protecting most but I am not sure you can put them under house arrest for 4 months unless they are pretty knacked anyway. There are a lot of fit old folk out there who will be ok if they follow sensible precautions. I suppose if things get out of hand you would have to enforce compliance by law.