apparently, lv was the first and only to split his soul into so many pieces. couldn't it be possible that doing so much damage to his soul would eventually backfire in some UNEXPECTED (note: i said UNEXPECTED) way? if you've actually read the books carefully, you'd know that magic is in no way a precise art. crap happens.
by the way, don't take this as me defending my theory. it was ONLY a THEORY!!! and, frankly, i really don't care that much. secondly, j.k. is the only one who knows exactly what happens (or happened), so just chill. i'm just as interested to know the truth (so to speak) as everyone else.
You Guys are forgeting some of the Key things in the books Forget the movies and go by the books. The proficy states that neither can live while the other servives That is because And dd said so that even if harry left it alone LV will still try to kill him. Not only that if some one murderd everyone you loved would you want revanged i would.
So harry will continue to grow strong because he wants revenge on Lv.
in this next book i garantee that harry potter will be twise as strong than alot of the wizards in his class just for that reason. he allready nows more than alot of seven years and he learn more. as soon as he is of age. ok
i doubt he goes back to shcool the way he talked in the 6th book..... he said him self if the school did re open he wouldent come back... i think he spends all the seventh of the book starting at Rons house goes to the weding and from their he goes out to find the horcuxes left, and also he said he wouldent get his friends involved but i think they go anyway if not when he leaves but after he leaves to find and help him.... if that makes any sence..
I found it unconvincing that a wizard who had already split their soul would have any inhibitions left that would prevent them doing so again. I would imagine that such cases of multiple horcruxes are just not reliably recorded.
JKR probably got the idea from Dungeons and Dragons with liches. Remeber Zanbar Bone! Or Rasputin from Fox's Anastasia?