We know from reports significant overloading is a major problem and is actually unsafe. Perhaps leading to medical incidents across the network each and every weekday.
if you are going to dangerously overload carriages then people are going to get frustrated.
Further, the hot weather has not really started in Melbourne as yet and then it does those carriages (and there are quite a few) who do not have working air conditioning will be a panacea for further unrest.
Melbourne rail rage soars as passengers feel squeeze