hmm good point kimbro, I don't think the 3 of them deserve to be there to be honest as they didn't leave in the usual way, therefore to me they forfeited their right to be at the finale. Esp George, he left because he didn't want to be famous/recognised.
Unless it is in a contract they signed before going into the show stating they have to be at the end show no matter what (BB thinking more people would watch to see if those who have walked/kicked out are going to attend the final show, curiosity and all that)