This is anti-social behavior and it leads to lawlessness and society sometimes having rather overbearing response to the increase (see ICE in the United States).
Paying for public services is a duty of the public. Otherwise you won’t have public services anymore. It’s morally equivalent to being a tax cheat, in my view.
Yeah, sometimes people develop an antipathy to certain social structures, and then that antipathy is defined as anti-social I guess, but there's probably no amount of Jantelov you can lay on that will make them change their minds.
They should have really had a ticket in the first place though, otherwise they are stealing from all other riders who have to make up the missed cost in increased ticket prices (or from all taxpayers since public transport costs are almost always already heavily subsidized).
Paying for public services is a duty of the public. Otherwise you won’t have public services anymore. It’s morally equivalent to being a tax cheat, in my view.