I once wrote on the assessing officer's portion of the RAF recruiting paperwork "This man is a w*nker".
Unfortunately his mum, thinking that the sun shone out of her son's backside, asked her MP why her son wasn't being accepted into the RAF. The resultant Parliamentary Question bounced back down to the office and I had to hurriedly reconstruct the form and write a whole paragraph in recruitment speak about why the bloke was w*nker and unsuitable for the RAF!
I learnt about correct paperwork from that!