I also find it rather creepy and would not make that choice myself.
But, enough people decide to go this route that I think outright banning it would be difficult. Recommending that folks have individual accounts and that if they must go the two people - one username route, also strongly recommend to indicate who is speaking every time would be sufficient in my mind. And let them know that if one or both are acting asshole-ish, then both will be banned as they share one username.
(Not a mod! Just my own thoughts here as always.)
Last edited by opalescent; 11-14-2011 at 01:33 PM.
Reason: grammar as always