I hope that the term "Professional" could be applied to some PPRuNe'rs and not to others.
A professional PPRuNer is someone who has paid Danny for a personal title.
How about it, you lot with a lot to say, quite a few posts, but only a sarcastic hint next to your usernames? Get your PayPal chequebooks out!
That might sort out those who are serious about being on the forum, from those who aren't, as I think PF#1 himself suggested.