Why you don't want to allow disabling "branches are global and permanent, did you want a bookmark"?

[vitalif at yourcmc.ru]

Hello!

As I've already mentioned (several times :-D) in Bug 3321 
(http://bz.selenic.com/show_bug.cgi?id=3321), the "branches are global 
and permanent, did you want a bookmark?" message is VERY annoying, 
especially when you like mercurial branches and dislike git ones.

What's the problem with implementing a simple configuration option like

[ui]
i_love_permanent_branches = true

?

This option won't hurt anyone who complains on hg not having git 
branches, it will just do a good job for users like me, which don't want 
bookmarks at all.

So why not implement it?

It's like Tips and Tricks dialog, which ALWAYS has "Don't show this 
again" checkbox.
I think you would be unhappy if you couldn't disable it - maybe there 
is something interesting, but it's very annoying to see it every time!
This message is similar, and there should be an option to disable it 
without patching mercurial code or using 3rdparty extensions.