Icinix wrote...
Shepard jumped. Into a beam. Of Energy. A random Ghost Child Shepard just met told him to jump into.
I ran into a talking tree today, it was taking a stroll down the road. Told me I would create a new type of life throughout the universe if I jumped in front of this bus.
Did the tree at least give you the option to control all the trees or destroy them all?

I think it all boils down to what was the intent of the starchild and what did his programming allow?
Could he lie? Since we didn't get a suprise ending on synthesis and as far as we can tell control and destroy did what was expected, I don't think he did lie.
The starchild doesn't seem to have a self-survival instinct since he offers up the destroy option. He doesn't have a control-freak complex or he would not have given the control option. He mentioned that the crucible offered up a new option if you war status was high enough, which wasn't one of the original options and maybe was meant to be the ultimate solution the crucible was to deliver. Harmony between organic and synthetic life by making them more similar than different.
However, at the time the choices are presented, we do not have the hind-sight available to us after we make the choice. All options could have been fatal to Shepard or organic life in the ME universe, so you go with what you think your Shepard would do, or you go with your gut based on the limited information presented.
I do think they should have offered the 'do nothing' option, which should have shown the reaper annihilation/harvesting of life on Earth and the other worlds, with the end result being new reaper ships and the citadel back to its old place, waiting for the next sapient life form to discover it.