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its possible at some point google or whoever is important at the time will use the nic database to associate domains that are "owned/registered" by the same person and penalise accordingly if they consider the interlinking of such domains spurious or spammy.
so am wondering what the possible consiquences of registering domains under a series of pseudonomes might be, basically worst case scenario - could someone else somehow contrive to transfer the domain over to themselves by claiming to be mr domainowner or the administrator mr admin (given that mr domainowner and mr admin don't actually exist)
this could be a dumb question, i've only had 2 coffees so far today - not yet entirely alert.
However as long as you keep the email addresses live for the ficticous person then you will be ok.
I have a few registered in different names (old clients) and i get all the emails for renewals and admin so no worries IMO.