Have you ever ridden a motorcycle across difficult terrain? The same physics apply. Certainly you wouldnt suggest that dual sport bikes dont belong in the back country. And, you probably understand that riding a moto across sand or rough terrain requires momentum and the right line - so you'd probably have no issue letting them pass. (Hopefully they saw your dust light and could gauge where you where in your dust cloud so they didnt crash into you). Why the prejudice against 2WD prerunner type trucks?
The two wheel conveyances I've ridden were powered by my own legs. I have (had) no prejudice against any kind of vehicle. I think I am a courteous driver. I try to be the first to pull off a one lane road, I wait for and defer to cyclists since I know how vulnerable they are, etc. When I was in the dunes last summer I did my best not to block the buggies, ATVs and bikes with my slow moving slow turning SUV.
If nine out of ten vehicles on these dirt roads are "prerunners" and motorcycles then perhaps it's the slow 4x4s that don't belong there. Otherwise it seems to me that prima facie it is a shared-use road, and that demands that
all users drive in a safe and responsible manner.
Several people seem to be describing a vehicle that is unsuitable for a shared road, one that expressly prevents the kind of courtesy I hope I exhibit if not being outright unsafe. I have no experience with this as I have never driven a "prerunner" truck nor have I had problems with anyone driving one. If a road is really dusty I wait for the dust from others to settle before I continue. If I see someone coming up behind me I look for a safe place to pull off and make use of it, then wait for the dust to settle. I
don't expect to have a truck, bike, or anything else barrel through my own dust cloud as I would never do that myself; to do so seems totally reckless.