All kinds of good reasons why someone might want to post in a way that wasn't tied in with their normal Mudcat name It might be they wanted to talk about something personal, that they wanted to keep private, but talk about - and Jerry have an example of this in his first sentence.

Or perhaps someone has constructed a Mudcat person that doesn't actually match up with the way they were. I can remember Martin Gibson telling us on several occasions that this was the case with him , and I'm sure he isn't the only one. But then, for some reason they want to say something in their own voice that won't be coloured by the type of things they've been saying "in character", and logging in as a GUEST with a name is one way of doing that.

And I'm sure there are any number of other reasons.

What defeats me is why anyone would feel a wish to come in as a nameless GUEST, except by accident on occasion, or as a new user. The only reason I've ever seen given is "because I can" and that's not a reason for doing anything.