Of course, your having been vouched for only proves that some two people attended a meeting with that other poster. It does NOT prove that the same two people who attended the meeting are the same who claim to be here, although they have to have known enough of the GC personas. For all we can know, a third person who did not attend the meeting could really be the one doing all the posting for you two. And if your very existence is in doubt, most of all it's impossible to prove your intentions. Even assuming your verified existence, we (and even the poster you met) cannot be sure that you are not yourselves antis that have some kind of plan whether for infiltration, actual entrapment or just gathering of information. The choice to first meet with an outie, rather than another anonymous, would make it easier for you in each of the three cases.