I'd just like to point out that not everyone at the "party" could see the mods or the codes. I for instance was standing south, near Diango, the entire time, however, I did not see a single code given. Perhaps something could be done about this?
The event was good enough for me, I can understand Jagex can't just let 300 people claim the code, since that would be less profitable for them.
It was fun seeing a J-Mod for the first time tho
But maybe it's a good idea to make the area inaccessible for pets, familiars, cannons and achievement banners for the time of the events?