I cannot believe that people are still seriously considering this whole thing of 'originating' somewhere and then tearing off one or two coupons, in order to start somewhere more convenient .

A few points for these people to consider:

1. This is fraud.
2. Almost all airlines have a means of detecting this abuse.
3. You will almost certainly be charged the fare difference between the cheaper point of origin and the more convenient point of origin.
4. By making such a booking with a TA then abusing the rules in this way you risk punitive action being taken against your TA; I've heard of at least one who was threatened with losing his job when clients abused tix he'd issued in this way.
5. This draws undue prominence to cheaper points of origin enjoyed by many FT'ers who choose to play by the rules. Ultimately it results in prices being raised. It was due to the unacceptable behaviour by a minority of FT'ers that LH and LX withdrew from IATA fares ex-TIP.