I think there is a difference between someone hoying up off the drink and someone being sick because of the heat etc.
How an operator would implement a penalty system and differentiate between genuine (unplanned) illness and someone who is off their faces, is another thing.
Not sure someone who is genuinely and unexpectedly ill, should pay a fine - whatever the inconvenience is to the operator.
I have been on a few buses that have been 'fouled' as a passenger.
Twice I ended up on a United Olympian (723 probably), that had the upstairs front window pebble dashed.
Another time, it would have been a GNE (or predecessor), the back seats were taped off, like a crime scene.
The bus stunk, but remained in service.
Then you have the empty beer bottles/cans that have been p!ssed in...
RE: Anything and Everything
'Illegitimis non carborundum'