Thanks to all the Uber drivers that have done me the favour of correctly rating passengers.
Rarely have I picked someone up with a rating below 4.5 that has been a decent respectful human being.
From now on I am not accepting any pings from any passengers rated lower than 4.65 Stars.
From my experience, anything below around 4.5 stars and you are asking for trouble or a really short trip from the train station!
Cheers to all the drivers!