I would choose the beginning of time. I believe that it would solve many mysteries that tortured humanity throughout its existence, like how was the universe created and such things.
I would save Axel and Roxas first. Axel's death was just lame. Roxas didn't actually die, but still he ceased to exist so it is still bad... @_@ After that I'd save Demyx... He was the most innocent one. And he had the coolest weapon of all... :P
Yes this is good dude, nice find... ;D I think they are Org members though... I checked what they wear closer, and yes it is Org.13 cloaks... Old members maybe...? @_@
Hmm well, it is said that a monkey has a chance of 1 in the 183,800th power of 10 to write a perfect sentence of Shakespeare's Hamlet... So this guy must be a really lucky b*stard...
Just make sure that you are 100% correct about it, and that you don't overreact... Besides maybe you should talk things over with such people, I've done it many times and it works. And really, don't act so superior towards someone just because they want to approach you. If you really liked somebody it would only be natural to learn things about him/her. So my suggestion on this is to talk things over...