To make them actually dangerous place a trigger on them (covering roughly ~5m² around the area) and synchronize it with all IEDs (or whichever explosives you use) in the killzone.
Set up the trigger to be activated by the player side.
In the condition field put:
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this && isServer && ({!(_x getUnitTrait "engineer") && !(_x getUnitTrait "explosiveSpecialist")} count thisList > 0) && (({alive _x} count synchronizedObjects thistrigger) >0);
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null = "Bo_Mk82" createVehicle (getPos thistrigger);
Tip: You can set the % of presence for the IED. If it doesn't spawn, the trigger won't fire either.