I notice some members have been "deleted'.What happens there?How does that work?Do members "delete" themselves or does someone else do it?and why?

Its a case of SOL they have cancelled their own membership & gone to ABB

Whats "SOL" and why would they do that?

Ummm how can I put it delicatly

lets see - oh yes I know "poop on the liver" (substitute the S word for poop)

You got it, well done.