I think it is very difficult to know. In the last analysis, we see only what we are prepared to see, what we have been taught to see. We eliminate and ignore everything that is not part of our prejudices. I'll leave it up to you to decide whether that is a good meme or a bad meme. My essay on Social Behavior provides an introduction to why humans, in a social setting, act the way they do and why they are so easily manipulated.
Common sense is the collection of prejudices acquired by age eighteen.
Before we examine this question, let's first agree on the definition. People with common sense tend to work problems out in real time by the application of simple reasoning. So, let us examine my assertion that common sense may becoming a scarce commodity. First off, I suspect that the amount of common sense available has varied much over history and over the various societies. Common sense flourishes when there is ample opportunity for individualism and free expression.