Hmm... What if all messages were sent to the recipient in a private message, and a notice was then sent to the recipient in the channel saying that they have messages?
Would that cover all the eventualities?
If so, then that would be much nicer.
And for reminders everyone should PM TuxReminder for those so that they don't clutter the chat channel.
You can try with "should", but be prepared to simply disable public commands, such that using /msg is necessary. It would probably be best and simplest to just skip this step, and go right to /msg only.
Thanks