You're joking, right? Even if we were talking about close tailgating, that in no way requires the kind of instantaneous reaction required by the sorts of disco

You're joking, right? Even if we were talking about close tailgating, that in no way requires the kind of instantaneous reaction required by the sorts of discourteous/dangerous moves that make the other guymgal brake. This is in fact the exact problem - oblivious idiots will happily sit in the passing lanes for many miles creating congestion and hazards. In many parts of of the EU, this will at least earn them a ticket, but in the US, it's just ordinary to spread out & 'drive' in an oblivious state...