I can see both sides of this situation...however I have to agree with Doggies3. There have been many instances where I had to drive my elderly parents back and forth to the doctor/hospital. When someone has a medical condition where it makes them nauseous or they are in pain (post-surgery) you can't drive as fast as you normally would. A sudden stop or start can put undue pressure on the body and make the person's pain or nausea worse. I am not a slow driver, but I am cautious when driving under such circumstances and I try to be as considerate as possible to my passenger as well as other drivers on the road. I will stay in the right hand lane unless I need to get into a left turn lane.
Everyone is in such a hurry these days...we all should slow down and consider this and think about how we drive. Is it worth the risk of serious injury or death of yourself or others to see how fast you can go from one red light to the next? I don't know about you, but I am willing to slow down and possibly be a little late to my destination than to not get there at all.