As a train fan, I would like to say that, if you know that you
are gonna to hit the time limit soon, then you should try to
tailgate and exit, and they will just charge you for Entry without
exit, where the admin fee is $0.70. Obviously it
is not legal to do this intentionally somehow, but it can happen on
old faregates (EWL / NSL). NEL, CCL and LRTs? Forget it, it is more
risky.
Please don't tailgate, you are gonna cause a lot of problems for
the person behind you. Once someone tailgate in front of me, I paid
for the person in front. Then it showed error for me. Then i went
to the station office, THEY DEDUCTED MY FARE AGAIN. Then in the
end, i paid 2 times =P