In Scotland we have a lower limit, 50 instead of 80. It fairly makes you think twice, as 50 is very low...so better not to have anything at all really.
Would you pay £50 for a taxi the next day when you got caught and knocked someone down and could wind the clock back? I think so.
I have a breathalyser to check the morning after level and it is very interesting what results you get. I would recommend anyone who likes a drink in the evening to get one...not cheap, but keeps you safe.
BTW, most 0% beers are sh*t, but Nanny State by Brewdog is actually very nice! I buy it for its flavour, which says a lot, imho.
The Duvel triple at 9.5% is pretty tasty too, but it's hard getting out of the chair after a couple of those!