How do they get the "Do not walk on grass" signs way out in the middle of the grass?
Answers:
They walk out there and put them on and then they walk off. They are usually for chemical treatments fertilizer/bug care. It is just saying to avoid possible contamination/damage to you or clothing.
Other answers:
They jump instead of walk.
They jump instead of walk.
Helicopters.
A helicopter hovers overhead while they lower a guy down on a rope where they want the sign to be... then he just hangs upside down and hammers it in.
Here is a picture of a lot of guys getting ready to place "Do not walk on grass" signs in a National Park.
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