First of, 56ker Fucker, let me say I'm a long time listener, and this is my first anti 56ker post.
Now. I think the best you can do is to hand fuck this little limey prick. Don't resort to scripted replies (feel free to use scripts to help alert you to a new 56ker post), but a scripted reply would seem, well, inoffensive.
I'd like to see a clever use of the english language implying different things about him, his sexual orientation, his hygenie, and his personal habits. It's a must this is done in the most vulgar manner possible.
Of course, to mix it up some, every once in a while come up with a good counterpoint. Prove that you're more than a foul-mouthed basted, and that the little squirming bitch deserves every flicker of flame he gets.
Hmm... maybe I'll even add a post or two against him, if you don't mind.