I have observed that there is a global renaming policy but a global username policy is absent? As we all know that usernames are global following SUL, and literally the same username will be used across multiple wikis.

So, a very simple question is raised: shall there be a draft of the global username policies, considering usernames are now global?

Also, also due to SUL, it seems that username blacklists should be put at a global scale, or it may just be not logical as one may just escape one wiki's username blacklist through creating it at another project, and use SUL to circumvent such block.

I hope for broad input, considering this may mean a broad policy change, and what I have in my mind is just a very primary idea to install a Global Username Policy that acts similar to the current Global Rename Policy that is in enforcement.

P.S. I put it here before placing it on meta RFC is not to avoid circumvention but hope to seek more input instead of just bumping a very large policy change without any external input.

Regards,

William