We'll have to start with a few clandestine meetings, in pubs and clubs, and suchlike places. Then, there will have to be some sort of agreement reached. The agreement will then have to be discussed and argued over. Some individuals will fall out with other individuals, but, at the end, one or two leaders will emerge. These one or two leaders will form their own splinter groups, which will then alienate the rest of the population. All such groups will then be declared illegal by someone, and that will be that.