Yes, one word from HH Dalai Lama would have stopped any further self-immolation. The Dalai Lama's words are most powerful as can be seen in the enforcing of His ban on Shugden practice. As a result of the ban, Shugden practitioners have been ostracized and subjected to unbelievable atrocities by fanatical anti- Shugdenists and pro-Dalai Lama followers.
The number of self-immolators has risen to 112. They are unfortunately creating a bad image for Buddhists. Westerners seem to be asking if this is a "normal Buddhist protest method". As the Dalai Lama himself now says, it is 'doubtful' if self-immolation is effective in getting the Chinese to accede to their demands for freedom and for the return of the Dalai Lama. On the contrary, the Chinese are now tightening security and withdrawing aid to the villagers of these self-immolators.
Finally, as many if not most self-immolators are monastics, it is such a sad waste of precious human lives, which had been fully devoted to the practice of the Buddhadharma to benefit all beings.