My site is listed but I have no account. You don't have to register to use the PIL database.
Unregistered users can still do searchs, submit and modify sites, anything a registered user does.
The only difference is in regard to submissions and modifications. This naturally means that response times vary. Sites maintained by registered users cannot be modified or deleted by other users. Their sites can only be modified or deleted by themselves, or by PIL administrators. After registration has been confirmed, all you need to do to add, modify, and delete web sites directly to the PIL database is Log On with the User ID and Password which you have chosen.