Maintaining database integrity between user records and node records

Hi,

I use content profile to extend my user's profiles, and now I want to create an extra "thin" user (that will never log in) that I don't want to connect to the content profile, and which is in bulk created through importing it with csv files. Although some fields within my standard content profile are normally required during registration, the bulk import does seem to work without creating the coupled content profile node with it, but the form of content profile is visible at the account page (with of course empty values) of the imported "thin" users.

My question is: Would anyone be able to tell me if this construction poses any risk for database integrity, since I will be creating more users than there will be content profile nodes. Can this give any problem, is the content profile module in any way expecting, or are you free to create as much users as you want without it being and staying 1 on 1 with the content profile node table?

Thanks for any advice!