One reason is due to abrupt reduction of sleeper and general coaches .
But same situation has been highlighted in some trains running with ICF coaches and relatively ample amount of non ac coaches .
Thus...
more... , another major reason is that ticketless travellers are allowed to enter the station premises , and they board the train they like, to their destination.
It also has to do with the mentality and attitude of people , who do not have any fear of authorities and take pride in ticketless travel in ac classes , and transform into a "regular offender ".
Railways should diligently work on :
1. Extensive checking on entry points of stations , to allow entry of passengers with valid tickets only . A ticket scan based entry system can be experimented with , and worked upon .
2. Railway station premises need to be adequately cordoned to reduce unauthorised " open access" to station premises .
3. The designated on board RPF team , TTCs and coach attendants should work actively and apprehend and fine the offenders .
Also , it is done in many trains at present - doors of ac coaches should be closed and locked . In case there is any boarding from intermediate stations (nowadays tabs are replacing the charts) , so TTC and attendant should co-ordinate and allow only specific passengers to board .
Its high time Railways starts working towards controlling this menace .