Thanks for all your opinions.

Reading and thinking I see that my problem is not anonymity but consistency. I've no problems at all with Mudcat handles that are no names (gnu), I've no problems with GUESTs consistently using a name or a handle (GUEST, Russ), I've no problem with Mudcatters using the GUEST mode for the purpose of joke or whatever when there is no attempt to hide the real identity (GUEST, Cletus), I even have no problem at all when there is a well understandable stated reason for anonymity (see Kim's example above.

Wolfgang