All I'd add is that it would be wise to make sure that whatever contact details you go with on domains, make sure there is a functioning email address in the contact details becasue if registrars see a load of bounce backs to WDRP emails that they are contracted to send out (as part of ICANN accreditation), the decent registrars will conduct an investigation into contact details authenticity which you wouldn't want.
As long as the WDRP emails dont bounce back, the contact details "look ok" and no payments get charged back you should have carte blanche to put in whatever details you want imo.
