I am very experienced in doing chillar trades. No opposing your view, I know you said it in a specific context, but just sharing my trading exp in this.
Do not trade tainted companies even intraday. There is no edge on a broader scale for regular trading if we trade on these. Bcz the volatility and movements in these kind of stocks cannot be gauged by Technical analysis. We never know how they react, sudden rise and falls happen in these stocks on smaller time frames and they gradually erode in larger times frames.
But if we trade intraday on good stocks like Kotak bank or Reliance etc.... we have a inherent edge that, these stocks react to basic TA on any time frame, & moreover they don't move too adversely. Also if the trader has capability, they can convert the intraday loss positions to delivery either partially or full without much worry as they are stocks with good fundamentals. For regular intraday traders, Doing intraday on good stocks has a built in edge.