When does the fear stop?

I'm going to divurge just a little and address driving speed. I seldom drive our MH over 58; that's just my personal choice for a number of reasons. This is perfectly legal even if the speed limit is 75. I also feel that it is within my rights even if there is impatient traffic behind me. I often hear that one has to "keep up with the traffic flow". Nonsense. I don't and have not been rear ended in 40 years of driving RV's under 60 and only got the finger or flashing headlights from other motorists 2 or 3 times. Creating a hazard? Maybe but that's not my responsibility as long as I'm legal. Many other driving practices create much bigger hazards. So, drive at your comfort level.