[BlueBream] Best practice: site location

[Baiju M]

Hi,
    In our FAQ there is question like this:
http://bluebream.zope.org/doc/1.0/faq.html#i-ve-registered-a-pau-in-the-site-root-now-i-cannot-log-in-as-zope-manager-what-gives

There we can read like this: "set up a folder beneath the root, make
it a site and add and register the PAU there."

Any other reasons to not use root folder as application site ?

Regards,
Baiju M