Hierarchical group names - component separator

[Tommy Kelly]

Can anyone see a problem with using "/" us the separator of components
in a hierarchical group name. For example, instead of:

mylists.linkedin.updates
mylists.linkedin.groups.gnus
mylists.linkedin.groups.yaks

I'd use:

mylists/linkedin/updates
mylists/linkedin/groups/gnus
mylists/linkedin/groups/yaks

The reason is that gmail supports "folding" of the latter style. My
concern though is that somewhere deep in the current or planned lisp,
using "/" will break something.

If it's currently allowed, then maybe take this email as a pointing-out
of the fact that gmail *does* indeed support use of "/" and so it would
be nice if it remained allowed in the future :-)

Tommy