ps vita, erase player

I got a ps vita in a junk swap, the guys kid knew what he was doing.
it's a little wierd to hand someone the thing and have them see that his kid has millions of points and I only have one.
how do I erase the former players in these games and save a little face?

It's really bad, in farming sym the kid has about 3 million dollars and i am broke!!!!!

Before you get too far into it I'd probably just format it
http://manuals.playstation.net/document/en/psvita/settings/restore_system.html

If it's like my PSP 3000, just go to the saved data utility and manually delete the save data from there.

I don't have a Vita, but it can't be too different can it?