Courtesy Flush

Why is it that when people in the office use the toilet, they DO NOT courtesy flush. There should be a law, that in an unventilated area, right after you hear that plop sound, you must flush. Doing this eliminates practically all the stink. If you walk into the bathroom when someone is taking a shit and they have courtesy flushed you don't even smell anything. However, if they have not, the entire hallway outside the bathroom stanks. Maybe they are disgruntled and just say fuck it, I'm going to stink up this place so whoever comes in here will be nauseas. I did that once. I was pissed so I decided to leave a stink bomb. These people do it on a regular basis though. That's not right.