I remember way back when I had to work with two labmates, D and G.
D was an arrogant loudmouth with a horrible temper and extremely poor people skills. Everyone was constantly concerned that he would mouth off to the wrong person and get himself fired or chewed out. (Amazingly, he was fairly popular with the ladies. This goes to show that some women do love the dominant types who don't treat people well.)
G was a racist bastard. He was active in his church, but outside of his church, he was cruel and harsh. He would continually refer to Indians as "Hadji," as though oblivious to the fact that he was uttering a racial slur. (Honestly though, I'm sure he was aware of it. He just didn't care.)
Both of them were supposedly adults, but they acted more like 14-year-olds. I'm glad I don't have to deal with them anymore.