[quote name='yukine']Wouldn't they show up as grey if they deleted you from their list?[/QUOTE]
Well, daroga's old code is still in my system, and he still shows up as black. So I'm not sure how to explain that. Same with ahmedmalik aka Zen Davis. His is still active, but I know he has a new code.
I'm mostly looking for people who no longer own their systems. For example, I asked MookyJooky - since he's a rather volatile critic of the Wii - if he still had his system. He does, but he's selling it, so he no longer owns that code. However, it would still show up as "Mookyjooky" and active on my side, even though someone else has it.
Though, I guess you're right - if the new person wiped the system clean, I guess it would get rid of itself on my end and turn gray.
Mmmm.
Basically if there's any CAGs who don't have/need/want/are going to sell/etc. their system and I can delete them, it helps me out.