It appears that physical signs that instruct us to do something, such as EAT HEALTHILY, actually can provoke an opposing response.
Bryan Earp, a researcher in applied ethics at Oxford University stated that:
"For unconscious or automatic processing, 'not good' is often taken as 'good' and 'not bad' as bad".
NO PARKING is a classic example as is DO NOT TOUCH on a museum exhibit; they are just 'green lights' for people to either park unlawfully or to reach out and finger that 4,000 year old papyrus scroll.
So it seems eminently sensible to me that we should reverse the message and request people to KEEP ON THE GRASS in order to achieve the opposite.
In which case please print off the following message and pin it on your local parish notice board....
NO LATIN MASSES HERE
There are even rumours that the powers that be in the Vatican are taking a fresh look at the Ten Commandments - "Thou shall covet thy neighbour's goods" could be the new order of the day.