Interesting.
I did actually start a thread like this some time ago, but it was pulled and I got my wrist slapped for it.
Perhaps the rules on this sort of topic have changed....
Anyway, I also have to disagree with the OP on this.
From what I've read on NDEs, I've not encountered anything that suggests souls that commit suicide are "punished" for doing so. To my mind, this way of thinking seems somewhat mired in the dogma of fundamentalist christianity, which of course damns all suicides to hell (i.e. "punishment"). Thus, unless you believe in a punitive christian god, then why would you expect those who take their lives to be punished for it?
No, from what I have read at least, people who commit suicide aren't necessarily treated any differently and are offered the same opportunity to come back and learn the lesson they tried to escape. As others have pointed out, the worst "punishment" for suicide is the pain caused to those left behind.