Email address mangling in hopes of preventing spam
Honestly, does writing an email address as “yourname AT example dot com” on a website really prevent anymore spam than writing “yourname@example.com”? Seriously, the regular expression to parse the former isn’t all that much more difficult to write than the latter.
I would suggest that you have to write the address in such a way that it requires a human to parse it. Such as: “My email is ‘yourname’ (without the quotes) appended with the domain of this site.” Essentially, you need to embed the address into one or more sentences in plain English that isn’t easily parsed by a computer.