I travelled by LHB Geetanjali a couple of months back from AK to DR. It was lunch or post lunch period, and me with a WL and wife with confirmed ticket had to manage the 8-9 hrs journey. SL ppl actually raised all berths and slept. Wife being lower berth passenger, had to request to other pax to lower the MB so we can sit. That enabled another WL passenger to sit. During the whole journey, TTE made just one appearance (about 6 halts) and made a show of checking random pax. Believe me, he did not carry the reservation chart. And we had that coach with split windows with middle blocked. Actually that is most desired during winters as it closes completely and doesn't open upwards like ordinary windows. It is only up to the TTEs and the RPFs to ensure no unauthorized pax enter reserved coaches. As far as...
more... GS or MST pax are concerned, they were lucky to travel so cheaply (many still are) in reserved coaches. If you have to travel, travel in the class you buy your ticket. If that is not an option, don't travel. You'll get refund if you can't board the class with clerkage deducted.