Regarding the joke question, what's being asked is extremely subjective, and it's impossible to give a "correct" or even "best" answer to it. However, in the interest of not clamping down too hard, we've left it open for the moment.
Have a look at this question: What is your most interesting photo of a human powered cycle…unicycle, bicycle, tricycle?What is your most interesting photo of a human powered cycle…unicycle, bicycle, tricycle? This isn't even a question, it's a post-your-photos thing that's not even asking anything, and is clearly in violation of the StackExchange guidelines.
Bicycles is about halfway through its public beta, after which time the SE folks will evaluate if this site will ever get out of beta, or if it'll be dissolved. This will happen in late November, according to Area 51. If this site fills up with forum-style threads, there's no reason for it to even exist, since the web doesn't need another bicycle forum. I'm active on two forums, and I enjoy them immensely, but this is a Q&A site.