This, a million times so.You clearly dont actually know what anonymous is if you think its something which you can just "join". Thats like saying your joining the human race.
Anonymous was originally an organized attempt at trying to impair the function (and to raise awareness of the abuse) of the Church of Scientology. Something which has been overlooked and largely forgotten by people realizing that suddenly they have the power to get large numbers of people to do their bidding.
.......Only that's not how things work.
A flawed concept which has driven itself to irrelevancy; any mention of Anonymous that I see these days is usually just a bunch of people (apparently with nothing better to do) bullying for the sake of it.