我是否应该更改我的设计以防止动态强制类型转换?

I have read several threads about dynamic casts in C++, all full of people claiming it indicates bad design. In other languages I never gave it much thought when checking the type of an object. I never use it as an alternative to polymorphism and only when strong coupling seems perfectly acceptable. One of these situations i encounter quite often: having a list (i use std::vector in C++) of objects, all derived from a common base class. The list is managed by an object that is allowed to know the different subclasses (often it's a small hierarchy of private classes within the managing objects class). By keeping them in a single list (array, vector, ..) I can still benefit from polymorphism, but when an operation is meant to act on objects of a specific subclass I use a dynamic cast or something similar.I have read several threads about dynamic casts