look ... i was worried too ...but come on ... lets be practical ... i dont think worry is helping anyone is it ? and our worry is definetely not going to change anything, so we might as well go on with our preparation as we were doing till now ... look the time we spend worrying will definetely be spent more useful for studying !!
as someone rightly points out that even if there is screening, all of us are again on equal footing so if someone is deserving then the deserving will definetely get into iit . so cheers and stop worrying and focus on your current preparation.!!!