I'll try an edit this post so it makes sense overall - and it's not necessarily pointed at flypig.
Most of us have road registered cars, some of which are modified. These modifications are done so the car remains safe and roadworthy, any engineering requirements are fulfilled. The cars are insured for the modifications.
Some of the cars have incredible power, such as robk's. Rob has spent a lot of time researching and engineering his own parts and he has had all modifications passed by an engineer and the car has been declared by that engineer as being safe and roadworthy.
He's had the car up to a pretty decent speed, at Wakefield raceway.
The majority of Australian states has pretty harsh penalties when it comes to 'hoon laws'. Big fines ($2000+) confiscation and destruction of cars, immediate loss of licence for 6 months then further penalty decided by court. Two year driving bans and possible jail terms.
So if anyone wants to do the wrong thing in their cars thats their business, but don't talk it up here.
There's this thread
http://www.mr2australia.com/mr2play/tm.aspx?m=109241#109313 - where some bloke drives like a gronk, gets it on camera, posts it here and there and brags about it. I imagine that the police would be looking further into that one with the publicity it received.
I'm guessing it wasn't you in that video - but here's a nice big spotlight put right onto our cars and probably this forum.