Have you ever used any unlicensed accessories for any of your game systems? Examples would be a memory card or controller that weren't approved by the company that made the system. There are even some games that were unlicensed back on the NES. If you've had any, did they ever give you any problems?
I was reading this morning that Microsoft's next Xbox 360 update is going to block unlicensed memory storage (cards and hard drives, it sounds like). Fortunately I don't have any of that, but I do have a third party controller for the system that isn't licensed.
I had some unlicensed PlayStation 1 memory cards and a PS2 controller. I can't use that controller with Star Ocean 3 because it makes the characters move on their own, but it works great with other games. The memory cards always worked fine for me, but I've heard about them failing for other people.