P&L Payoff webinar

What are the dangers and pitfalls of carrying forward an options position till expiry, other than STT?

STT is the biggest trap, we have discussed it here - http://zerodha.com/z-connect/queries/stock-and-fo-queries/stt-options-nse-bse-mcx-sx

After from this the risk of holding on to OTM option, with a hope that it becomes an ITM option can be a bit of s concern.

Sir can you please elaborate on that? What is the problem with holding em OTM contract with the hopes of it turning ITM?