its very common. generally every body are rail fan, some of them shows them and some do not. some are mad behind them and some don show their madness behind.before coming here i was thinking that i am mad 4 trains and railways but after coming in iri i saw lakhs of people are mad about railway. but this madness is good becaue of such madness only we help here and grasping knowledge related to railway.from people point of view this is madness,deewanapan but in our perspective it is called "PASSION"