yeah RCA, its a judgement call for the tech when removing them, any experienced tech will notice this right off and take precautionary measures and if he see's that its not happening with any positive results he should inform the customer of the situation and give him the option to make the decision. And yes its true in alot of cases its the same tech that usually deals with the truck again, i just threw that in there about a different tech because some dealerships tend to use the policy of making a 'quick response' to service calls and send out the first available tech.
In any case they (the customer) generally leave it up to the tech to make the call for them and they take the advise of the tech. But in any case i always keep a 14mm helicoil sparkplug kit onhand just in case ;o)