I kept the last one of these I got as it so bizarre as to be worth bronzing. Addressed in a way that had to have been derived from my Usenet sig. It was two VIP tickets to a trade fair for battery farming products in Hannover, Germany. As far as I know I've never posted anything to suggest I had any interest in battery farming and the only place in Germany I've been to in the last 15 years is the transit lounge at Frankfurt airport. I presume the trade fair's PR company must have had more promo stuff to get rid of than they had addresses for so they had to resort to desperate measures.