[internet_points]

    > The carrying power of a 10-11 gram
    > bat is indeed amazing, some 15-18 grams; the incendiary bomb was in this
    > range (17.5 grams). Bats can carry such loads for miles. And bats with
    > dummy bombs released in housed areas dragged the loads into sites highly
    > favorable for fire-starting. W e released bats successfully at various altitudes
    > both from the B-2 S and from an open Attack Bomber, in which flying was
    > great fun. 

omg

    > Then,
    > suddenly, X-ray was cancelled. I never learned the reason, but can make a
    > guess. The bats would be vectors for bombs, but they would be vectors also
    > for germs. Our side might be accused of initiating biological warfare. 

oh yeah because being accused of doing something horrible while doing something horrible would be horrible.

[HenryBemis]

I believe that they perceived it in the numbers. Exploding bombs will kill a limited number of people. Imagine the nightmare scenario that a bat-bomb will explode in a school and kill 10? 20? toddlers. Now imagine some virus that can wipe hundreds/thousands. This escalation would force the opponent's hand to respond appropriately, and if 'standard' war (bullets, artillery shells, missiles) is hell, chemical warfare is worse.