I don't have any strong feelings either way (meaning I wouldn't complain) about separating role play and non role play. However, I will say this; it is difficult for me to stick to only role play talk and only non role play talk. As an example, which is not exactly a parallel but similar is online RPG's.
However, Transporter, you make me wonder if the RP talk is a problem for some people. I just assumed it wasn't but well, you know, assumptions get you into trouble all the time.