Dont worry pakru... atleast here in SR we have de reserved compartments.. But if u see in Jodhpur, Kota, Jaipur Area, we can see that the open ticket holders get into sleeper with GRNERAL TICKETS and then fight with us for seat as if we the reserved ones are ones travelling with NO TICKETS...
from Personal Experience where I was forced to wake up from sleep to accomodate 4 GEN TICKET HOLDERS where I was holding a VALID RESERVATION TICKET.