Remember This? CityRail Fare Evasion advertisement (1991)

Fare evasion on Sydney trains has always been a constant problem. Below is a 1991 advertisement from Cityrail warning commuters if they cannot be bothered buying a ticket, Cityrail will give one out for you (which would be more expensive than the ticket you were meant to buy).

Even with Opal Cards, the message is still relevant in 2018. It is still fairly easy to evade, especially where a station has no ticket barriers. However, it is pleasing to note that ticket inspectors are on the trains more regularly than they were in previous years, which makes evading a fare a little harder.

Source. CityRail. 1991. "If you can't be bothered buying a ticket, we'll give you one" (Advertisement). The Sunday Telegraph, September 13: 131.