Yeah, that's one of the reasons I often dislike karma in popular culture/common conversation. Too often is it twisted to mean "an eye for an eye", when it means anything but. Hell, a comic I read somewhere parodied that very idea by having a character go "I believe in Karma, which means that whenever I do something bad to someone, they must've done something to deserve it."
But I honestly don't feel like getting in a forum discussion on "the real meaning of karma", not to mention that it skirts the boundary of discussing real-life religion.