Yes Sargent, good call. These "side curtains" were retrofitted at the end of the model run (2010-11) after a near 20 year run of the same truck. Know little about how they are activated, other than there would be additional sensors in the side ?(where ?).
I get a sporadic airbag light in my 2010 that may to be related to the passenger side seat weight sensor/seat belt clasp. I work at a large city facility that services all Ford vehicles. Rarely do we send things out to the dealer for repair out of warranty. Even air bag related as our technicians are Ford certified, they perform the recall campaigns. The '10-11 Ranger have been exceptions and the airbag warning issues can't even be corrected long term by the dealer. Never had a safety incident, but they befuddle good technicians often. We don't have many pre '11 Rangers left in the fleet now due to age. Seeing a few new gen Rangers now, but we mostly employ F series.
Also of note, the nasty frame rust/rot we all hear of and/or have experienced have never been a major issue according to our staff. Do fleet buyers get a better product ? Probably have a little more clout at least when you purchase thousands at a time...