When I shared a desk with our 'complaints' guy, we often got 'weird' calls on a Friday afternoon. Not because the 'weirdos' came out on Fridays but, being Friday, other people who'd usually field such calls went home at noon, or 2 PM at latest...
Like my colleague...
My beloved wife taught me the rudiments of 'telephone manner' beyond my default, 'Huh ??'
Some of the calls were easy, like explaining that the oleic acid in our products was entirely synthetic. Thus pacifying Vegetarians, Vegans, and the many, many folk who considered cows sacred and/or pigs profane. Yes, I was aware of that trigger for ghastly 'Indian Mutiny'...
Some totally had the 'wrong end of stick', like claiming our site's many products used MERCURY {Spit !!} as preservative.
Thiomersal ? Nah, went out of general use a dozen years ago. In fact, our only use for it was here in labs where warily used to prevent prompt spoilage of one (1) 'factorised' titration reagent, which otherwise grew green algae faster than a stagnant pond. Just the light filtering past the floor cupboard's doors sufficed...
I very, very carefully avoided any mention of the mercury in dental fillings, and that distinctive metallic tang from newly set...
Funny thing: After my talking callers down from tirade, we usually ended up trading cat-stories...