Things I found in your delicious product

We have a friend who sends letters to big companies like Unilever, claiming to have discovered unsavoury things inside their products. He always receives free vouchers for stuff in return, like the ones here, which Quaker Oats sent him when he said he'd found a ladybird in his Muesli.

Whenever he gets the tokens, and letters of apology from the companies he's written to, he's elated. He feels like he's brought big business trembling to its knees, terrified of one man and his ladybird.

A ladybird's pretty credible though, even if he didn't enclose it in his letter, I'd believe it if I was working in Quaker Oats' Customer Complaints department. But what wouldn't I believe? How would I tell a fraudster from a wronged consumer? Would I care? 

So we've sent one to Nestle saying we found a latex glove in a KitKat finger, (enclosed/chocolate-smeared), and another one to Cussons claiming there was a horseshoe in our Imperial Leather shower gel.