Such a broad question, here is some info I found;
According to info I found anonymous has no actual membership. People just operate
loosely under that name. While Scientology is a religious group, a church. Anons can
be members of Scientology.
AnonNews.org : Everything Anonymous
AnonNews 2.0 is finally there! Press release submission is open again, as are comments – and we now have forums! Other interface languages and language/tag filtering …
Anonnews.org – Cached
Anonymous | Define Anonymous at Dictionary.com
adjective 1. Without any name acknowledged, as that of author, contributor, or the like: an anonymous letter to the editor; an anonymous donation. 2. Of unknown name …
Dictionary.reference.com/browse/anonymous – Cached
Anonymous is now AERIFY MEDIA
Anonymous Media – Anonymous was created by data, research and ad exchange experts to tackle the key issues facing advertisers in the online advertising ecosystem.
Anonymous.com – Cached
anonymous: Definition, Synonyms from Answers.com
anonymous adj. Having an unknown or unacknowledged name: an anonymous author. Having an unknown or withheld authorship or agency:
“ We [Anonymous] just happen to be a group of people on the internet who need—just kind of an outlet to do as we wish, that we wouldn’t be able to do in regular society. …That’s more or less the point of it. Do as you wish. … There’s a common phrase: ‘we are doing it for the lulz.’ ”
—Trent Peacock. Search Engine: The face of Anonymous, February 7, 2008.
Definitions tend to emphasize the fact that the concept, and by extension the collective of users, cannot be readily encompassed by a simple definition. Instead it is often defined by aphorisms describing perceived qualities. One self-description, originating from a protest video targeted at the Church of Scientology, is:
We are Anonymous. We are Legion. We do not forgive. We do not forget. Expect us.
Iconography and aesthetics
[icon] This section requires expansion with: information on Anonymous subcultural elements; common images, themes, concepts, etc. (February 2011)
As a cyberculture, Anonymous aesthetics are based in various forms of shock humor, including genres of cringe, surreal, and black comedy. Many people affiliated with Anonymous associate with the Guy Fawkes mask, either at protests, or within images spread online.