Registered members here in Gnutella Forums can communicate with one another via Private Messages...
PMs are private. Mods do not and cannot view them.
Sooooo.....

The one big bad bit about people communicating with PMs is that, if there are problems and solutions are discovered, the general membership here does not benefit. Right ?
And, setting up any 'private' file sharing denies those files to the Gnutella Network.

Aside from those two bits of bad... Go for it !