OP, anons are quite testy. Their bark is as bad as their bite; their bite is nasty. That said, keep going. There is a *price of admission*. In my own freaking opinion, so just back off! Grrrrrr Woof! Woof!
1) How does Anonymous define membership? Is it completely based on self identification? Anonymous is a nebulous network of human beings who independently (or not) decide on actions that support the whole organism. The organism cannot be named, defined, identified, interviewed, or killed because it is an idea. Every anon defends the idea. Every anon moves the idea forward. Every anon participates to some degree, to the growth of the organism. There is no membership; there is only participation. This makes perfect sense, but when it doesn't, you may need to sit down with a nice slice of moist caek. Investigate the First Rule of teh Interwebs and you will understand moar. 2) How much do you know about the identities of other members? Irrelevant. 3) What are you most proud of that you've done with Anonymous? Answering this question. 4) Have you ever felt in danger as a member of Anonymous? If so, when? Every time I participate. Particularly typing this. 5) Was there ever a time that you did not want to associate with an action attributed to Anonymous? Yes when they act like little boys in basements. 6) Is there anything else you think we should know? Yes. Much.
I interpreted that to mean like the Epic Fail Brigade. Like people you don't want to raid with who wear the mask and show up when you hope they won't. Self identification as anonymous would just be the sense that you identify with anonymous as part of who you are.