[quote=Nujaby]
If you don't receive any more notifications, isn't that kind of like a ignore system? If so, assuming the other participant is starting a new convo would that one be ignored as well? I think the easiest way to delete pms would be to simply have the option of deleting an entire conversation with a partner so you only have active conversations in your folder. That would keep things very neat and tidy, imo.
[/quote]

What if the convo has 3 people and 1 person "deletes" the convo?

I'm setting up for a system where participants can come and go at the whim of a GM that adds and removes them (or the participants remove themselves). You can probably see where I'm going with it.