"far" seems to start at about 3/10.
If the bans started at 3/10 then UKIP would definitely be banned.
BNP members went on to form paramilitary organisations that are linked to the murder of immigrants.
https://en.wikipedia.org/wiki/Combat_18
> Combat 18 is an openly neo-Nazi group that is devoted to violence and is hostile to electoral politics, and for this reason Sargent [the founder of Combat 18] split decisively from the BNP in 1993.
"far" seems to start at about 3/10.