I'm not saying - and wouldn't say - 'don't protest against the BNP'. For that matter, I wouldn't say 'don't protest against the Liberal Democrats'.

And yes, throwing eggs at people is a form of political protest. It's not one I approve of (it's possible there might be a situation in which I would, but this isn't it), mostly because it's a little bit close to assault for my liking. It also - to my mind - gives the impression that people opposed to the BNP have no arguments against them, and have to resort to violence to try to silece them. Especially as one effect of the protest is that Nick Griffin cancelled a press conference. It will look to a lot of his supporters as though he's been prevented from speaking uncomfortable truths that some people would rather were left unsaid. It doesn't matter that the 'some people' in this case aren't the government or the media (if that is indeed obvious to a BNP supporter); what's clear is that they're anti-BNP, and therefore part of the great big 'what's wrong with this country today' gestalt that the BNP supporter voted BNP to protest at.