In message , at 00:24:51 on Mon, 18 Oct
2010, Peter Smyth remarked:
I do agree that if you touch in
then out again very quickly at the same station such that you couldn't
possibly have made a journey (within, say, 10 minutes), that it should
be free.

That could result in people entering, then touching the exit gate and
not going through to get free entry to the system.

s/could/would/

One again revenue protection, and preventing the cheats, makes life
difficult for the rest of us.
--
Roland Perry