Some critics of the pessimist often think they have his back to the wall when they blithely jeer, “If this is how this fellow feels, he should either kill himself or be decried as a hypocrite.” That the pessimist should kill himself in order to live up to his ideas may be counterattacked as betraying such a crass intellect that it does not deserve a response. Yet it is not much of a chore to produce one. Simply because someone has reached the conclusion that the amount of suffering in this world is enough that anyone would be better off not having been born does not mean that by force of logic or sincerity he must kill himself. It only means he has concluded that the amount of suffering in this world is enough that anyone would be better off never having been born. Others may disagree on this point as it pleases them, but they must accept that if they believe themselves to have a stronger case than the pessimist, then they are mistaken.
Naturally, there are pessimists who do kill themselves, but nothing obliges them to kill themselves or live with the mark of the hypocrite on their brow.
Thomas Ligotti, The Conspiracy Against the Human Race, p.50