Black tape on the check engine light will probably be just fine. Maybe. I hope. π
I don't find that I get reversed faces all that often when I work. And fixing them as I go isn't that big of a problem. I just right click on a properly oriented face and choose Orient Faces. I do see if frequently in models by other folks who start with flat surfaces divided into smaller faces and then use Push/Pull on them. Of course in those cases, while it looks like the faces are reversed, SketchUp is doing the correct thing if you look from the other side.
As was already mentions, internal faces can cause problems but those should probably be removed anyway.