[Zope] + in url /zope object name

[Brian Sullivan]

I am running into the problem mentioned in:

http://mail.zope.org/pipermail/zope/2003-October/141868.html

I have "+" used in a directory name of some content generated outside
zope that I want to upload. Preserving the directory name is necessary
for the integrity of the data.

Why is "+" a prohibited name for a zope object? As a solution Andy
Mackay suggests modifying zope to allow "+" in a zope object name. Is
there a downside to this?