Originally Posted by
bradtx
"There's more to braking than just latching on to the brakes at the top of a hill. If you brake that way with either discs or rim, you really aren't getting the most out of your brakes and you could cause damage to either system...although the discs might take longer to show the problems. There's also the fact that to ride that way is incredibly slow." --cyccommute
Just was thinking about a worst case scenario of a loaded tourer with trailer decending, not attempting to promote improper braking.
Brad
A slightly different braking technique is required with a trailer but it's still not a real good idea with any brake to apply it for miles and miles. If nothing else a 7 mile trip at 10 mph would mean using your hands to squeeze the brakes for around 45 minutes. If you could still feel your hands at the bottom of the hill, they'd probably be cramping

I have ridden down Rabbit Ears pulling a trailer. I still flew down it, braking only when I either gathered too much speed (for someone else's comfort) or had to negotiate a corner...which rather wide and sweeping. My 6 month old daughter survived the trip...and still likes speed 25 years later

It's not the worst place I pulled a kid trailer either