I used to use that script hosted locally on Impossibly Stupid as a first line of defense against poorly written spiders trying to scrape my email. It doesn't do much, but what it does do is surprisingly effective. I wrote it over 10 years ago when I used to use a very basic shared web host, so I had to write a simple Perl script to give my email indirectly.
But as you can see from the above link, I switched over to using the version I have hosted on my corporate site. While I certainly could (and probably will at some point) enable Perl to run the script, it struck me that what I wanted to do for that particular script was yet another thing that I could maybe do with Apache itself, RAGtag-style.
Now if you look at the link on the right sidebar, you'll see the new version. The redirect is generated by a single, simple RewriteEngine/RewriteRule. And as long as it still works to keep the spammers out, I'm not going to say exactly what it is! Certainly if Impossibly Stupid can figure it out, so can you.