Mainly most parents hold the belief that BTC, lacking government oversight and approval, is primarily associated with money laundering and illicit business activities.
I could guess that was the problem, it is sad that at a time when it should be very easy for people to do their own research and get the right information, they make their decisions based on what they read online from anti-bitcoiners who constantly attack the network. BTC with its public ledger and transparency in tx's isn't as good for money laundering as people think, except it is done by someone with a very good understanding of the network. Laundering money with cash is so much easier, but people think BTC is the problem.
You've rightly recognized the roles of the anti-bitcoiners in this present case, It seems that these detractors can often be viewed as a "Trinity" composed of three influential entities: The Bank, The Media, and Political Power. Against these detractors it's important for us to continue the engagement of the public opinion in constructive dialogues and educating them of the multiple perspectives surrounding this trans-formative technology. Hoping that with our persistence and perseverance in the public awareness process we can get the mainstream public opinion on our side.