Here’s a sneaky one to watch for. After just announcing that my “early discount announcement” list was discountinued, and updating the page to remove the subscription form, I had someone immediately join the list.
I did some digging around, found their referrer, and they’d gone to Google’s cache of the site.
Naughty person.
So, if ever you need to make sure no-one can join a list, download something, take advantage of an offer etc, because they were didn’t react quick enough to your emails or blog posts, make sure you check the cache and disable the offer from that as well.
[James - that was clever, so I'll let you off, you naughty boy!]