ESA, we need to go back to Jet University like these guys and learn how to fly all over again. Clearly we are dangerous.
So far, in this whole thread, you have consistently been the one with a "Holier than thou" attitude, so, expectedly, you have been catching flak. No one is calling you an idiot, or saying that your doing it wrong, or whatever. But thats what you have been doing. Just go to the thread about "landing." You know which one I am talking about. The one where you called it "commercial aviation," and it's standard practice to retract flaps on the runway while flying "commercial," which you called 121/135 I believe. It may be that way at your company, but everywhere I have worked (which wasn't Jet U, but one of them the most respected EMT/Tail wheel schools in the nation/world), and currently work, has been to not touch anything unless absolutely necessary while on the runway. The bottom line is, if you had to retract the flaps on the runway, three things have more than likely happened.
#1) You had to do an off field landing, and were running out of room. T/O distance is usually more than landing distance, so just leave them down until you clear the runway. Your in a high workload environment at that point, just focus on maintaining control.
#2) You are demonstrating the technique to an examiner, so you MUST use the proper procedure for a short field landing.
#3) Some outside factor, be it winds, you landed long, whatever, have caused you to want to reduce the amount of lift the wing is making to keep the airplane planted. So at that point, depending on the situation, it is necessary.
To sum it all up, it's a matter of technique, and then, it's situation dependent. You may feel it necessary to get off the runway in a timely fashion, to not screw someone, and there is nothing wrong with that. I treat the runway as mine while I am on it, and if the controller can't keep us spaced far enough apart, thats not my problem. Am I going to try and get off for the next guy, you betcha. But am I going to do it at the potential cost of screwing up and compromising safety, and possibly loosing my job, negative. If thats not up to your standards, I'm sorry. But I am more concerned about #1 (me) than anything else, because if I take care of #1, then those in the back will arrive at their destination safely too.