MyBB Community Forums

I know there is a way in the Admin to set the minimum characters of a post and I know how to set it, but I only want to set the minimum characters for the first 10 posts of new members. 

Is there a plugin available for 1.8 myBB that can set rules for the first 10 posts, like minimum characters per post?

I could probably make one for this (it shouldn't be too hard).

I would suggest searching first though.