He (or Pranzo) sent his lawyer to track me down and find out personal info on me. Managed to find an account I had on a music classifieds site where I had posted my name, location and email address. Forgive me for being so dumb with my personal info on the internet, I was 17 at the time.
The lawyer character messaged me via the music classifieds forum and told me I would easily be prosecuted in court for operating an adult site based on American servers under the age of 18. He used a lot of hypothetical scenarios, acted nice and forgiving but also made clear the hole I was digging myself into if I didn't comply and shut the site down.
The risk outweighed the gain of continued operation for MacroIB so I went ahead with shutting the place down. The only good thing about that imageboard was the /b/ forum, anyway. We had our fun on there, fostering a community of sorts. I miss ib4f also, it was a much better system than 8chan is currently.