I think many of the people here are over reacting, There can be technical faults once in a while, Why to make such hue and cry over split milk, They have already fixed the issue.
This is a loser's talk that I lost my money because of Zerodha's Terminal, Come'on guys We all should have our stops in place well in advance, What if a big fall had happened in matter of few seconds, What would have you done then?
There had been days when u would have gone for a pee and come back to only see nifty crashed 300 points from the last price you have seen.Then you might have complained NSE that why you did you allow HFT(High Frequency Trdaers) traders which resulted in Flash Crash.
Most Profitable Professional traders do not enter trades by looking at the terminal watch list, They have their entry triggers and stop loss triggers well placed in advance.
1) How many times you wrote a complain to Electric department that your power supply glitch had rebooted your router, which resulted in glitch in internet connection and you lost money and I am going to sue you for that.
2) How many times you have wrote a complain to your Internet Service Provider that Your service did not work for 5 mins and you gonna sue them for the Losses made in markets.
You have your right to raise your concern, but the same message can be given in much polite way.
Do not forget that Zerodha started this revolutionary Discount Brk concept in India and every Trader is saving 2-3 nifty points per trade which could have resulted in couple of hundred points in a month for a day trader. Just one instance of a Glitch and you lost some 40-50 points and you are blaming and talking of Sueing Zerodha, Not worth buddy.. Better, you foucs your energy to work on your Trading methodology.
Re-Iterating- Most Professional traders do not enter trades by looking at the watch list, They have their entry triggers and stop loss triggers well placed in advance.
Having said all this, Zerodha off course have to take the necessary action and I am sure they will mitigate all such risks ASAP.