With regards to latency, in Paris the biggest hurdle to increase trafic is people. You can quite literally walk through like on the Japanese video linked. But the vast majority don't.
The way it's supposed to work is that if you pass your card while the gate is opened, it keeps the gate open longer.
In practice most people wait for the gate to close in front of them before reopening it.
I'm not sure why people do fgaf. I think the reason is that this makes you look like a fraudster going right behind a valid passenger.
I do wait because I'm sure that my ticket is validated, and therefore won't be fined by a controller. Sometimes the machine visual/sound signal is broken, so no way to be 100% sure.
Makes sense. I've already been controlled several times after validating through a broken machine without any issue. But yeah it looks like the tide is changing and they are starting to fine for their own faults.
The way it's supposed to work is that if you pass your card while the gate is opened, it keeps the gate open longer.
In practice most people wait for the gate to close in front of them before reopening it.
I'm not sure why people do fgaf. I think the reason is that this makes you look like a fraudster going right behind a valid passenger.