Well, simply that in any roleplay with an open concept and an unlimited amount of participants, there tends to be a lack of correlation and consistency.
Say there are six people, and they all decide to do different things, but at least try to interact with everyone at once.
By page two things will be confusing, with post twenty maybe refering to post three since it was the last time they posted, and maybe two or three people posting observations to everything on every page while being Ninja'ed and contradicted the whole time.
Basically it's impossible to respond to every character in a situation, and so everyone will spiral off into their own subplot, meaning there'll be like twelve separate role plays in one thread, progressing at random, since some people post everyday, others every week.
Plus there's the quality issue, some people are good at roleplaying, some people have different styles of narration and some people are just plain awful and don't know when and where to start. XD
I think it'd be a bit of a spoiler if some stranger jumped in on a passionate interchange with 'I start kissen u.

". Hahah. Which seems to happen a lot in my experience.
Heh, don't get me wrong, it'd be brilliant if it worked out, but it'd be difficult to pull off!
So I'll wait and see how many people join, and if it turns out a nice size with some decent roleplayers, I'll jump right in.
