Many-Worlds and String Theory

First Postulate: Given an infinite amount of time, the chances of any event A happening approaches 1.
Postulate 2: An infinite amount of universes can substitute for "time" in post. 1.

If there are unrestricted parallel universe, then shouldn't there be a universe in which someone comes here and kills me before I finish this? What if event A is the formation of a being that is capable and willing to do so? Many-Worlds says we cant interact with other universes (quantum suicide) but string theory lets gravity influence parallel universes, and if nothing else see post. 1.

either my postulates are wrong, the 2 theories are wrong, or there are a finite number of parallel worlds, like in The One

I'd have to disagree. Until the technology arrives (see: LHC), thought experiments are all we can go on. They are valid insofar as they can find illogical implications of ideas on what subquantum behavior means, and no one says they are anything more than that.

And the with infinite time, probability becomes counter-intuitive, not retarded.