I think that you'd also need a different credit card for your "fake" psn account.
Since you can't have one CC on two accounts.
Then you need a CC on file so $ony can charge you, if you forget to turn off auto-renewal.
Man...Destiny was one of the games that showed promise (as far as Console games go of course) and I think it delivered on the multiplayer, questing, gear aspect part of it, but the campaign/story was laughably bad. I just beat it about an hour ago and I'm shell shocked. I, dead to rights, can't believe this is what Bungie put in the release of one of their "visions" for a game.
I'm still going to have to fun doing PvP and collecting gear but this is one of the WORST campaigns/stories I have ever played in my lifetime. It would have been better if there was no story.