The world is full of them – rude and inconsiderate people. We have to share this planet and in doing so it is good thinking to consider not only yourself but other people.
We have such a brief time at life and making it difficult and selfish only leaves a very bad trail behind us.
We can choose to be civilized by simply being civil. So, when you think it is appropriate to be inappropriate may I suggest you ‘just stop’. Just stop being antisocial. By all means live in your own world but remember you have to share it with the rest of us.