The owner behind the website has also cataloged some of his correspondence with people who failed to realize milk.com was not dairy-related[0], some of which are very entertaining.
I used to have microsoft@<isp> as an email address, and would occasionally get complaints about blue screens or other Windows related issues. People did not know how email worked in that time.
Some are funny, but it shows how 'trusting' some people are. It seems like mailing is a kind of harmless game (they actually shared addresses with strangers).
I hope/think most people are more cautious nowadays :)
Thanks! Unfortunately (or maybe fortunately) the internet has grown up, and it's been a long time since someone has sent bona fide misdirected mail to the site.
[0] https://milk.com/experiments/