Most QR trains are smiley. Unfortunately, you won't be smiling for long once you're on board. You can't even eat or drink on the bloody things despite there being vending machines on station platforms. (fine is like $230 or something).
The icing on the cake is that the enforcement is done by people wearing black, colloquially known as blackshirts (harhar). Although in practice, they've softened up over the years, especially with regards to fare evasion likely because any real fare evaders would require cops to actually deal with.
[1chan]