The only instances I’ve heard of this at LACs is that (at least at the schools with which I’m familiar) students need to have a certain minimum GPA in their major to receive a degree in that major. It’s usually low-e.g. a 2.0. While they aren’t technically kicked out, unless their eventual GPA is above the minimum they need to find another major. I’d say this is pretty rare in that most kids major in a discipline in which they do well.