The BNP

Nick Griffin was acquitted of inciting racial hatred a few days ago.

I'm no fan of the BNP. Nonetheless, I support their right to be racist and air racist views. The solution to the voicing of unpopular views is:

a) Ostracise those who voice unpopular views.
b) Counter and logically discredit such opinions.

In the market anarchy society of course, property rights would restrict freedom of expression. But on your own property, you should be free to say what you like.