Blimey, that escalated quickly! No, we have our means and I'm not going to post them on a public forum, Needless to say its done in a positive manner, there has been the odd genuine Pinhoe traveller stopped and asked a question or two, but when you explain to them why we're doing it they're actually very supportive, its all about doing it in a non aggressive and focused way.
Its not just Pinhoe either, to a lesser degree St James Park, though that's a bit easier as there wouldn't be many (though there are some) legitimate journeys for that flow, along with the fact that there's a fair chance every Exmouth train has had some form of ticket check.
We had few reports from guards about short faring from Crediton, passengers who had actually travelled from further, so we have done a joint Crediton and Exeter Central block a few times in the last week. At Crediton we scan any E tickets and we sell anyone requiring a ticket, anyone who turns up last minute we hand a blank piece of paper with that days codeword so they can hand it in wherever to buy their tickets.
There were several conversations had with people who had forgotten where they had boarded but asked for Crediton (and some St Davids, but thats something we've been onto for a while)
It involves a manual scan/check at Central, the scan log will show the Crediton station block scan.