Soft,
Once you trade f&o, it is considered as a business and no matter profits or losses you have to file your returns.
It could be a serious problem in the future, especially with IT department getting technologically advanced. Today the notices are being sent automated and defects are being spotted. IT department is also working with exchanges to get data on individual turnover and etc...
If you see both the blogs, you will know that if you decide to ignore, you can get a notice tomorrow to pay taxes considering 8% of your turnover as profits..
So advise is to not take this lightly like we all used to before