As this is even against the rules, there will not be any chances to fulfill this suggestion.
It is an open mine to abuse and exploitations, account malusers etc. etc.
There is a long list of Why Nots.
Just to give you an idea, for to do this, you need to give your all account login details to that friend,
then someone you think is your friend, finally is not, they make them to show as your friend so they can get hand of your account, then they sell your stuff etc.
Then after all this you will report your account has been hacked.
Now was that clear enoughs?
Now before you write a suggestion, I suggest you to read the rules first to know what is against rules=
What you will never suggest.
Player Conduct Guideline Version 1.7 (CoC)
http://forum.pirategalaxy.com/viewtopic.php?f=248&t=13454
Now to call attention to this rule:
9. Transferring or trading of accounts in Splitscreen Studio owned games are strictly forbidden as all virtual property within Splitscreen Studio owned games belongs to Splitscreen studio or its affiliates.
(This includes Account Sharing – Use of Account by other than Registered Player of that account).