And since they’re entry and exit, there’s many methods to enter by triggering the exit side, from umbrellas to a small dog.
And since they’re entry and exit, there’s many methods to enter by triggering the exit side, from umbrellas to a small dog.
The social stigma, unpredictability and inconvenience of having to pay the fine is a big part of it (not having a ticket is just stressful). Another part is that you don't need to prevent freeriding, nor recoup all the lost ticket sales. You just need enough of a nudge to keep most people honest most of the time.
Obviously "not having too many unauthorized riders" is a very different objective from "only allowing authorized access and refusing all else".
Nuisance riders are: disturbing peace, damaging proprty, assaulting passengers or staff.
Police behaviour, not fares.
(And have social and justice systems which can effectively deal with individuals in need of help or discipline / isolation.)
The specifications for those gates almost certainly include a requirement that they allow a sufficiently determined person through without breaking themselves, and probably sound an audible alert.
The gates at my work are enter/exit as well but we have to swipe out.