Ahhhh I love that! I think it's a good way to announce to everyone that F1 is in town. I always stay in the city and I make sure that I'm outside at that time on the Thursday and lap it up, it's an amazing sound bouncing through the city.
I had a small tiff with a protester one year, in the 1990's when the race started mid afternoon. It was the Sunday of the event, we got off the tram around 10am at gate 1 and went for a stroll away from the circuit towards the bay for a look. The fuckers were setting up near the little underpass and one of them made the mistake of coming to me with attitude and throwing a placard in my face. I pusher the fucker into the garden and recommended he go to a travel agent and leave town for four days instead of imposing on people's choice of interests. One younger girl led the charge of a bunch of other protesters and they came running at me, I didn't know what to expect next but was ready to keep shifting them into the garden but the kind Policeman controlling traffic at the nearby lights came bowling over after the race going crowd starting cheering me on and he shoved a few into the waste height railing! They turned on the copper and while he wasn't watching I shifted another one over the small fence into the garden. Got a bloody good cheer I did! The punters loved it.