I'd go with first introducing who we are – no names required just say: "Hi there!" to anyone who's interested.
The first thing that needs to be explained is the masks or no matter what we say we will still be "The crazy dude with the V for Vendetta mask on." Just say something along the lines of:
"I'm sure you're wondering why I'm wearing this mask. It's not a joke, it's actually very serious. See that guy over there *point* he's photographing us. Out of respect for our privacy and the privacy of our loved ones we wear these masks. So that should someone take offense to our peaceful protests we cannot be targeted and made an example of."
Then go on to explain WHY we take these precautions and specifically state that everything we do is peaceful and non violent.
Frankly, most people will think you're a religious bigot. If they say this then just reply with:
"We have no problem with the Religion. People can believe whatever they want to believe – We disagree with the Corporation behind the religion. We even support Freezone who believe in Scientology but refuse to pay the more than $300,000 dollars it costs to learn those teachings."
LEARN WHO FREEZONE ARE – If anyone asks you further questions you should know about them and some back story.
Freezone Info
You will also meet people who don't care either way. These are the hardest to get interested and the easiest to convince. Tell them about Operation Snow White (http://en.wikipedia.org/wiki/Operation_Snow_White)and how L Ron Hubbard's (The founder of Scientology) wife infiltrated the American IRS with 10 other high ranking members of the Co$. Explain about Narconon – the Co$'s 'rehabilitation center' – (Narconon Info) and how it violates human rights and has been found guilty of practicing illegal medicine and medicine without a license in several countries.
Four great rules for talking to people:
1. Be Polite – They are spending THEIR time listening to you, the least you can do is show some manners.
2. Be Entertaining – If you do not entertain people they WILL zone out and not really listen to what you're saying. Sure you don't have to perform a juggling act, just answer what they ask instead of spewing information out at them and be an all round good bloke.
3. KNOW THE FACTS – There is no point in talking to people if you don't know what you're talking about. Know why we protest and know enough that you can convince anyone that your point of view is at least a valid one. If you don't know an answer to a question, point them in the direction of someone who does.
4. Give them direction – Tell them how to find out more; http://www.enturbulation.org and http://www.anonsa.org are good start points. Make sure that they know about these sites before they leave. The best way to do this is to give out a card to them with those websites so they don't have to remember them. There will be some floating around at most protests – kindly ask an Anon who has some and he/she will happily give you some to hand out.
Follow those and we might just get a few more protesters at the next rally :)