It is somewhat like a necromancer travelling with an army of undead.
An army of dominated human (or other common race) may not look weirder comparing to an army of zombies and skeletons in a town. But still, a bunch of travelling people who never enter big church or some kind of community hall of good aligned organization (often protected by Hallow = Magic Circle against good) may seem strange to the twonfolks.
And more. Undead monsters are created from dead people's body. Usually, you can get enough number of anonymous dead bodies in catacomb, battlefield and such. So their friends and relatives often don't come to claim that undead. Because their relatives are thinking that they are already dead.
But in case of a bunch of dominated humanoids, they are an army of "mysteriously disappeared" people. So, some people may looking for, or actually chasing you to "rescue" one or all of your minions.
If you want Igor, he is not a dominated human. He is more like Death's Chosen prestige class in Libris Mortis