This FA needs to get a new job if she's so delicate the mere mention of the word f*ck within her earshot sends her off the deep end.

Unless the OP was a real threat (which the LEOs apparently determined was not the case), it was a waste of everyone's time. She missed a great opportunity to build some customer goodwill by empathizing with the customer and assuring him it was frustrating for her as well.

If you agree that the FA acted reasonably, you may want to become a recluse and avoid all contact with the outside world because some of us say F*CK when we're frustrated. F*cking deal with it.