Simply the most evil company on the planet.

http://www.ahrp.org/infomail/05/01/27a.php

http://en.wikipedia.org/wiki/Bayer_AG#Controversy

They "bought" concentration camp prisoners and performed tests on them... and killed all of them. They had their own concentration camp during WWII.

They knowingly sold factor (for hemophiliacs) that was not properly screened and infected untold numbers of hemophiliacs with HIV and other bloodborne diseases.

The list of atrocities goes on and on.

The biggest problem with genetically altered anything is that there is no way to truly determine how it affect the environment in which it is introduced until it's too late to do anything about it.