For all of you having a little teary about the fact that you want to have the most Hecktic mods for your killah ride, or for you mod list in your signature, If you play with fire, you're gonna get burnt. Eventially you'll get caught and get given a pretty little yellow sticker. It's part of the game.
As for the Police congregating around an event or place of business which supports Legal, off street activities, it deters people from doing such activities in a controlled environment. If the Police continue to target people who are trying to do the right thing by taking it off the streets (regardless of whether their vehicle is legal or not), this will encourage people to get back into the organised on street activities.
A few years ago, there were extremely well organised street drags in different location ALL over Melbourne. So well organised that there were portable drag style christmas trees and invite only entrance. As far as I know, they have dropped off quite substancially, leaving a whole bunch of muppets to cause havoc like the Noble Park situation.