hahhha black death dude you fail no offence to a noob tho but its very easy the only reason i will tell you this is cause you want it for knowleage but be4 i tell you how know this to much knowlodge if actualy bad =)
Well all you do if Force brute the Persons Email on FAcebook and eventualyyou will get it thats the nobish way to do it =)
Hope i helped