Added Mar 7, 2013.
Much of the anti-droid sentiment existing in the galaxy is unwarranted bigotry, but even pro-droid activists will find it hard to defend the rights of droids bearing arms. The memory of droid armies is still fresh in many minds, and the legions of mechanized troops used by the Trade Federation and other corporate interests paved the way for legislation that eventually did away with the soulless infantry.
Relics from that era still exist, such as the battered chrome war droid known as IG-88. The tall, cylinder-headed and heavily-armed mechanical bounty hunter responded to Darth Vader's call to capture the Millennium Falcon during the events surrounding the Battle of Hoth.