Crouching Inspectors, Hidden Parking Meters

You spend thirty minutes trying to find a parking spot near the beach that won't require you to move your car every hour or two only to find a ticket on your windshield when you return!  Upon visiting Queensland for a holiday, I found stacks of parking signs near the water which had clearly been removed to avoid getting ticketed.  People have also been known to put gum into the coin slot of a parking meter as a protest against the local government.  With invisible parking signs and broken parking meters, surely we shouldn't receive a ticket?

On top of the invisible parking meter predicament, I've checked my tyres to see if they have been chalked and then soon thereafter ended up with a ticket.  I don't know where the inspectors are coming from and why they even bother to check areas which have clearly been vandalised by locals not wishing to pay for parking while they enjoy a little sun, but the appeals process for parking tickets is so time consuming that I find myself not always contesting them even when I am in the right.  Should we have to pay parking tickets when there is no visible sign or the parking meter is vandalised?  Should it be illegal for inspectors to hide behind bushes?