I blame Brexit
I'm sure I heard Jeremy Vine on the BBC say that a recent survey in the Guardian from a think-tank showed that since Brexit there has been a 1000% increase in people gobbing on Italian cars. Or then again I might be making that up like 76% of all statistics
Seriously though good manners and thoughtfulness are a lost art and its only going to get worse. Just imagine what the spawn of those ill-mannered scumbags you encountered are going to be like and then what their nasty brood will become etc etc.