Having said that though; currently we're given 4 "chances" until we lose the license (based on 3 points ea), now they're making it 5 (end up with -2 pts, but I digress).
Let's say hypothetically they stay with $231 for 10-20 over, then that makes the Govt/RTA $1155 instead of $924 per driver losing their license, and it seems that there's a LOT of them. Let's go on a rough example and say per year, 3000 people lose their license (no statistic evidence, I'm guessing). That's another $231*3000 they make, while just seeming to give serial speeders more leeway. ($693,000, by the way). I know it's not all that much in the scheme of things, but still. Admittedly for the average person who might get stung once and go, ooh shit, better slow down... It's not that much of a drama.
It just seems like a last-minute grab for Ms Kenally to try and mollify the NSW populace. We've all got the shits with NSW Labor as it is; I don't think this is going to make people turn around and go, hey, everything else they f**ked up wasn't that bad.
(Not that I want Libs in there either...)
EDIT:: Your point about signage for the cameras is true though; they've been sitting in some pretty sneaky spots. At least a sign will be a "hey, if you haven't been watching your speedo, do so NOW".