Excuse me Mad but lets point out a few things
Firstly, a heck of a lot of bikers do not break the law. so assuming that because I'm a biker I break the law is simply a silly generalistic statement. I know plenty of car drivers who are happy to bend rules, are they all evil as well? you seem to be portraying us as such?
Secondly, lets put this past you and see how it works, if when taking a motorcycle test you are presented with a queue of traffic and "if safe to do so " you do NOT filter you will FAIL!!!!! So work that one out! Filtering is not illegal in any way shape or form. In fact most people do not actually realise that there is nothing in LAW that stops you undertaking in this country. Yes, if you ride like a dick and a copper sees you you are risking a due care or even reckless driving but good quality filtering is not going to get you in trouble. In most cases Police Range Rovers will even move over if possible to let you through!
As for when it says a lane is closed I spend far too much time on motorways and very rarely see a correct useage of the lane ahead closed signage. In fact I can only think of one instance in the last 12 months (or >30K miles of mainly motorway driving)
As an aside, did you realise that whilst teh signs overhead are mandatory, the matrix signs between the carriageways are advisory only! Most people do not realise this.
I'm happy to bow to your greater knowledge if that is the case but hey I think I'm quite comfortable stood upright for the moment.
