I just looked up, and ironically it was Young himself.

In April he banned "zeytoven" (the crazy Nivea stan) and probably forgot to uncheck the option "ban IP", which means all IPs linked to that account were banned.
Depending on our provider, it can happen that a previously used IP is being used again.
In fact "zeytoven" posted 1 reply in the Boochie thread on February 18, 2016, 01:25:58 pm.
That post happened to have the same IP as Young
now. Which explains this mess now.

Mods, you always have to UNcheck the "ban IP" option when you ban someone, so this won't happen again. I'm pretty sure I already posted that information in the mod section last year. But I hope you all know now.