In that all pages belong to the whole project, any user may edit this one. But it's generally more helpful (and polite) to discuss the proposed change on its talk page first.
 | This page in a nutshell: the talk page is the place to discuss this |
The think tank is actually the (user) talk page. Please comment and/or discuss there.
A summary of what is discussed and even perhaps decided there may also appear here from time to time.