As there are hundreds of new ICO's every week but unfortunately most of them are scams atleast more than 30% of new ICO's are scam and if things go like this then people will lose trust on ICO. Kindly help me with your suggestions about filtering scammers.
You underestimated it, not just 30%. The scams in the current icos should have exceeded 60%, which sounds unbelievable, but the icos are really bad now. Most of the projects are aimed at defrauding money. Don't believe the white paper, that's just to make you believe in them. Once they get enough money, they won't do anything.