Pulling the pin would have not direct effect on the noise. I move mine in the full range of motion out/in/middle, whatever. No change in sound.
The torque on the three bolts is really low, about 22 foot lbs IIRC. Unlikely it's not torqued to spec, but if you don't have a torque wrench, you could very lightly see if any are loose. Basically friction/gravity holds things in place.
Did you have them install camber bolts (loose)? Other than that I'd look for tears in the rubber on the hat. Other odd possibilities might include them leaving something else, or a coincidence and it's a
strut bar bolt that's loose (common problem).