From recent news in India it is heard that bitcoins are used to sell drugs..I know its a currency and it is also used as a normal money... but these can create a bad space in people's mind that bitcoins are used to sell drugs..so they will not use bitcoins... Conclusion is that BTC is also a currency which is having a high value in the market..and bitcoins must not be used in these illegal activity which can reduce its usage and value.
I think the problem is there for every user. Because bitcoin itself is not used for illegal and negative things. Perhaps the gap in bitcoin for illegal activity exists, but that does not mean that bitcoin is a negative thing. Then use bitcoin wisely and do not need to do illegal actions with bitcoin.