I am new to the forum and to Shadowrun. I am playing the face in our campaign. It is just my personal opinion however just because someone is clever in real life, or a social log it doesn't mean that he can't be one or the other in Seattle.
I work for Honda as a Japanese translator and I have 0 Japanese skill in game. If the GM requested that everyone who is doing social-fu be a real life social juggernaut that would be as unfair as me speaking in real Japanese to NPCs. Using skills that you have in real life, is just as bad as not allowing people skills that they have spent Karma/BP on.
If you want crazy social combat rules try Exalted where you get social special attacks, its only a matter of minutes before you and your friends are having a Phoenix Wright rule lawyer battle...
We are going to do Social-Fu like we did in Exalted but with the Shadowrun rules, tweeked. Say what you would like to say: like a joke, a threat, or whatever you want. Just give a quick explanation, then roll and try to role play the results. Just because someone isn't good as others at role playing shouldn't lock them out for what they want to do with their character. They should be encouraged, most of the time its stage fright. I think the giving the bonus dice and external penalties as mentioned before is a great idea and I am gonna run that by our GM