Geordie:

I do not know why you think Guests are not welcome here. As for political correctitude, the only boundary I have noticed is one of courtesy and mutual tolerance. The only people I have seen being treated as though they were unwelcome are those who abuse the trust of communication -- namely, that you seek to speak in ways that add to understanding and cause no harm. There is a preference that Guests use a token of identity so that others can know when they are speaking to the person who says which thing. That is a courtesy which increases understanding. There's nothing more to it than that, i am certain.

A