People seemed to like the little Spamhaus blocklist downloader script I wrote for pf on #OpenBSD
I tweaked it a bit more to make it easier to download and combine multiple lists and to make it simpler to use on Linux too
https://gist.github.com/cypnk/a9831a099908a25a0cf35dcc2adaef16
The "ftp" utility on OpenBSD is a different beast than on many other platforms. It's like a Swiss Army knife file transfer program
On Linux, most people use wget or curl. I figured more people were familiar with wget so I used that for Linux