Well... I am firmly in the pro-immortality camp. However, I have given thought to the quandary of the fact that for any given immortal being, the probability of becoming eternally trapped at any given moment in a "And I Must Scream" scenario is non-zero (though admittedly vanishingly small). An infinitessimally likely result will occur at least once in an infinite number of trials, however, so... that's a troublesome one.
Better to be immortal with the option of suicide, than to be literally incapable of dying.
Surely the net value of having the option depends on the magnitude of the chance that I will, given the option, choose suicide in situations where the expected value of my remaining span of life is positive? For example, if I have the option of suicide that has only a one-in-a-billion chance every minute of being triggered in such a situation (due to transient depression or accidentally pressing the wrong button or whatever), that will kill me on average in two thousand years. Is that better or worse than my odds of falling into an AIMS scenario?
That aside...
via.
Sounds like sour grapes. I'd heard of people holding such sentiments; this is the first time I've actually seen them expressed myself.