This is still the way it works in San Francisco on the buses and light rail.
"Comparing the six month period before the 'next generation' fare gates debuted, to the six months that followed, Embarcadero station saw a significant reduction in the need for maintenance work — from 112 hours to two hours. "
...
"When you see how dramatically these maintenance requests fell, the numbers tell us that these fare gates are preventing unwanted behavior that impacts the station environment," BART spokesperson Alicia Trost told the Chronicle. "Those people are no longer entering BART."
https://www.transittalent.com/articles/index.cfm?story=BARTs...