After reading some post a member said you can choose to be a ghoul or not, has this information been verified?

no. you can NOT become a ghoul

edit- this Has been confirmed

Nope you can't be a ghoul or any other mutant.

Well, technically every wastelander is a form of mutant and since we are not born in a vault or have been living in one it's safe to assume that we are a mutant.

but we are still mostly human. it depends on your definition of mutated is. you may be "mutated" but you still appear just as in other human would.

You are technically correct, the best kind of correct. Still won't be a Ghoul, Super Mutant, Trog or any other wasteland creature other then "Human."

I wonder if it'll ever be possible (Maybe FOOL could be the exception) seeing as every NPC has to have an audio voice now.
Would probably be easier to implement if they only had a few talking heads and text based dialogue with the rest of the NPC's.