What the lateros are doing is illegal and there are police everywhere. If they're caught selling beer, their stock, which they purchased themselves, will be confiscated. But, for the tin men, it's worth the risk.
I'm getting used to the sound of hovering helicopters but what can I expect, living in Lavapiés? I live in a barrio so routinely pushed to the edge that, every now and then, the pressure becomes too much and its people crack.