Acting like an ass is not getting your point across? It puts people on the defensive (see what I did there?)
Be open and discuss, share links to real information.
People don't understand this situation...that's understandable. Right?
Help people understand.
I want to agree but when your roomate keeps trashing btc as "monopoly money" while you teach the people about it in front of him since 2010, You cannot fight the urge to argue with him this way in 2014.