Following Sony’s decision to ban certain users from the PSN for jailbreaking their PS3 consoles, the modding community has snapped back with a new hack that will allow users to unban themselves.
The hack also will allow users to ban other consoles, provided they have the consoles ID. It all sounds very underhand and very illegal so you’d be wise to steer clear. And keep your console ID close to your chest.
Thanks to Destructoid for the info.