What do you think about people who are inconsiderate of others?

I think that many people who are inconsiderate of others do not think. For example, if someone disrupts a class while other students are doing their work or trying to learn, then that's just really disrespectful to both the teacher and the students. If someone doesn't care how they treat other and don't mind being treated the same way, then they can go right ahead and do it but there is a high chance that they are going to be treated the same way or worse. It's irritating to see someone like that because sometimes there is just no way that they'll understand. That's my opinion on inconsiderate people but then again I can be a hypocrite sometimes.