User Blogs - create user-blogpath just for users allowed to blog?

Hi,

I have on my drupal-5 installation the blog-module enabled, but just certain users have the permission to have a blog (Access control >> edit own blog-permission). But now, when a new user registers, a new path for a user blog (www.mysite.com/blog/[userid] or as definded differently through the pathauto module) is created, even though the role that is assigned to new users (authenticated user) does not have this permission to "edit own blog"!
--> This creates (through pathauto) per user an URL-alilas, which is not at all needed! I would be VERY glad, if someone could tell me, if there is any possibility to disable this? (Or at least that these alilases are only generated for users that are assigned to a role with a "blog-permission"?)

I tried to just solve this through configuring pathauto differently, by leaving away [user] so that all blogs created land in www.mysite.com/blogs, but pathauto then still generates these alilases: e.g. "blogs_0" for "blog/2"; "blogs_1" for "blog/3", etc.

Thank you...
hQuadrat