A comment sent in, daft entryism but well worth sharing.
The BNP has around 10,000 signed up members and as a political party it will have some form of constitution which governs the election of commitee and executive members. If 11,000 people all joined the BNP in a short period of time and just prior to the annual conference (or whatever the BNP call their Nuremburg rallies) then we could vote off the executive, install one of our own, donate all party funds to an asylum seekers charity in East London, have a drink and go home. Job done. If we wanted to really have a laugh we could stay on running the party and make it totally progressive.