Hold the Door Please!

Among all the ways we can slice and dice others with whom we share this world, recent travels have led me to place other hotel guests into one of three categories:
  1. Those who carefully close their room's door so it doesn't make unnecessary noise.
  2. Those who don't realize doors often slam on their own, but begin closing the door carefully once they learn how much noise they make.
  3. Those who let their door slam with abandon regardless of the hour of the day (or night).
What intrigues me is why anyone ends up being in the third category.  I get that because I travel so much I am more likely to be aware of (and sensitive to) how much noise I might make for other guests. As a result I am almost always in category #1.  But why do those in #3 not move into category #2? 

Why in the face of obvious negative repercussions for a choice that has been made do people still persist in avoiding the simple behavioral change that would yield more positive results? 

Well since the door slammers wake me up so frequently, I'll have plenty of time to read the new books I've picked up related to rational decision-making and intrinsic and extrinsic motivation.