Derivatives segment is so nicely liquid that any misdeed of throwing retail investors from this segment will shrink the liquidity badly. They should instead make a move to direct the brokers to block such retail investors who have made an 'x' amount of loss in a financial year for that year, if they are so adamant on saving the investors. This will keep the gamblers away and the individuals who are skilled in a professional manner could do the business unhindered.
When I started trading , many people who were trading in equities and making good money in that segment advised me to remain away from Options because it was risky. I still thought of getting the knowledge about Options that why these instrument have such an image. Got hold of many aspects of Options and started trading them in a controlled manner. Some of my biggest profitable trades were from Option trades in Nifty & Stocks. If I would have not went into knowing Options, those trades would never have materialized.
SEBI is trying to snatch away opportunity from many future talented traders.