I remember that I was once in company that regularly rebuked me if I referenced to anything I knew from Wikipedia. While I was not nearly the worst perpetrator of such things (far from it), the lesson was drilled well enough in me, that if I did not know something, I either satisfy my curiosity from a proper book on the matter, or I simply avoid using a shallow internet source and remain in ignorance.
The effect has been remarkable. I simply do not feel the urge to talk about things on which I do not know, and if I do speak on it, I speak only substantially.
Of course, in those days, even if I had the names of proper books and referenced what I knew from there after having read them, some people cynically believed I still copied it from a search online, and it took some effort to show them that I did my extensive reading.
But I owe a lot to that cynicism.