Hi Steve,
That is possible to do, but it's just another admin job to do and it is usual for these "d**kheads" to register using their normal IP but switch to devious tactics when they decide to post. I doubt it would prevent it happening. Also I wonder why I should, because 3 repeat offenders out of 4950 decide to try to spoil something they just can't stand to see others enjoy.
I could insist that registrations include First and last names, but what would that achieve? I can prevent people from being able to register using a hotmail email address (the "d**kheads always seem to spend 5 minutes getting one, it's easy) but then people who are genuine hotmail using members suffer - and there are far more genuine hotmail users than "d**kheads, why should they be affected by 3 idiots?
To be honest, for the size of the forum, we don't have as much of this as maybe we could. I sort of enjoy the chase, although I hate to see normal topics turn away from the subject into a banning argument. Where I'm from if you have a problem you stand up and make your grievance known, people don't hide and make sneaky comments. I'm disappointed that people are so cowardly.
Above all else, I wonder, what is it about CBF these people despise so much? It's not a controversial subject, it's about a (once?) sleepy little place that touches people's hearts. It's a great website. I can say that not because I am a big headed twit, but because I know that it is great because of the people who post, as much as anything else.