They tell people to avoid the things called objects in OCaml which essentially are just row-typed dynamic records and an inheritance system. Really it's the inheritance system people are taught to avoid... Same as anyone in OO is being taught now.

OTOH OCaml, as an ML, inherits an outstanding module story which is really the core of OO anyway. I'd happily say OCaml is a better OO language than Scala for that reason.