Are you talking about the ability to hide a base class method with a derived class method? It's not really considered a good idea to do such a thing, but it's an inevitable consequence of mixing early- and late-binding in the same language
Yes. It sounds like we agree that overriding a non-virtual method is a bad idea, and i think "mixing early- and late-binding" probably captures it quite well. The C++ compiler makes the programmer decide whether to use early or late binding, and handle the consequences.
In some other languages (let's say Self, for example), the distinction between early and late binding is handled by the compiler, so it's invisible at source level, and all methods are (implicitly) virtual unless the compiler can prove that a static call is safe, in which case it can inline the call. That means that the "early-binding conflict" situation can't arise in a language like Self.