I always wonder why they don't board the back of the plane first? When I boarded the plane I was told that there were very few overheard bins left so I should put my bag in the first empty spot I found. Except there were no empty bins. So people were going all the way to the back of the plane to find a bin. Then they got stuck back there until everyone sat down. One guy went back to the middle to sit in his seat and someone else was in his seat. Turns out 15 people were in the wrong seats. We left 10 minutes late.