When I maintained the dat, I didn't knowingly leave WiFi codes in it either. I'm sure there were some in there, but it wasn't intentional.
Now, I still maintain my old dat for myself (and my friends), I just don't publicly release it anymore, but the only code I currently have in mine for Geometry Wars is the backlight codes. I think it's fun to unlock everything myself and cheats for it would ruin replayability.....and this is one very replayable game that deserves every second of the time people spend playing it to unlock the content in a normal manner. I wouldn't purposely put any codes in a public dat that would have screwed with their online ranking either, but I don't have, nor do I ever plan to get a Wii, so a code to unlock the extra galaxy would be nice.
Of course, since I don't publicly release my dat anymore, I put whatever codes I find in it now. I am responsible enough not to purposely ruin online by using cheats....not to mention the fact that I don't play games online or bother with posting my hi-scores online.
But the general public....well, they have to be censored. They have to be governed. Put dangerous codes in a public dat and all hell breaks loose online. Next thing you know, the person who made that dat available starts catching hell from companies and/or hackers for allowing such a dangerous code to be so widely spread....if they find out who did it. Nintendo starts threatening to end the online component for that game due to widespread cheating and then NO ONE has a chance to have fun with that game online anymore. Never mind that any "fun" was ruined by cheating.
The mega-dat is supposed to be mostly for Mom's and Dad's to hook up little Timmy and Sally with codes to help the kiddies have more fun with their game and to help them if they get stuck, not dominate the online community. It's for people who, for whatever reason, won't or can't create their own dat.
I passed the task to Grimalkin because I wasn't willing to comply with the wishes of the hackers. G is crediting them all, I wouldn't do that. G is checking many of the codes to see if they actually work, I never did that. So ease up on Grimalkin. He's maintaining the dat with more respect than I ever gave it.
If you want advanced cheats that screw over the online aspect of a game, it's YOUR responsibility go find them and add them yourself. All the sites that provide most of the codes in Grimalkin's dat should be common knowledge by now.
(Oops, wall of text again.
Sorry 'bout that. It needed to be said.)