We recently had a terrible flood of registrations from spammers, and just blew it on approving users, because so few of them are legit. To combat this, I changed the "CAPTCHA" feature for registering an account. We now ask some Rosemead-specific questions that should be pretty easy for any locals, and not too hard for anyone in the surrounding communities. You can look it up on the web.
They might be tough for someone from out of the area, or another country.
Here are the questions. Tell me if any of them are too hard.