Well, I think formatting it would do the trick, but you'd lose all saves and stuff, and your friend code. Alternatively, uninstall HBC with Data Management in Wii Settings, then use an exploit to run AnyTitleDeleter and delete HAXX (Homebrew Channel's Title). You'd also need to wipe play history, dunno if AnyTitleDeleter does that. But be careful with AnyTitleDeleter, or you could brick. If you have preloader installed, you'll need to completely reinstall your system menu with AnyRegionChanger to get rid of it. If you have cIOS, run the installer again to get rid of it, or delete with AnyTitleDeleter (i think those will work). If you have BootMii, you won't be able to "revirginize" as you put it, because it's currently unremovable. Any custom channels, delete with AnyTitleDeleter to get rid of tickets. If you have anything installed I haven't mentioned, tell me and I'll try to tell you how to remove it.