Well you can't use Store without a Nokia account...

Although i think the OP is getting too paranoid over this (after all, why only would your details be shared vs the 100s of millions of users) I think this is possible...

Look thru /var/lib/aegis/refhashlist and see if there is any file there that has something to do with start-up (i'm sure it'll be in refhashlist) and modify that start-up file...