I think my pet peave on Youtube is calling a piece of Music, a 'song'.

When we were in university we did not have much money but we went a few times to the opera (last minute student tickets). We could not afford to buy expensive clothes so we went with our normal clothes on. I found that the opera we went to was quite friendly because people looked happy to see young people there. They did not seem bothered by our clothes. However, we went to our home city opera with special deals for students, again with our normal clothes, people dressed in cocktail dresses and very expensive clothes just looked at us like we were garbage. I even heard someone saying "Today there all kind of PEOPLE coming to the opera" with a snob look on us. I felt so bad being there that I could not enjoy the opera at all. I never went back there and thought that is why someone not already a classical music enthusiast who wants to explore this area might have a very bad experience and hate it forever.

I have too examples of educated people who know little about a subject I have some knowledge. But they probably know more than I do on other subjects. But I always wonder why some people just assume things like "Oh, it needs a tuning?" instead of something like "I know nothing about pianos, is it tuning problems or something else?"