It happened (in 2009) over a weekend but it wasn't until the grass died off bit by bit that phallic symbols started to pop up around the school grounds."Penis prank captured on satellite image"
Every week another crude image revealed itself, much to the dismay of staff.
"There's not really much we could do about it," (acting principal Gerhard van Dyk said.)
"The caretaker took some more weedkiller and tried to camouflage it a bit."
Mr van Dyk never caught the culprits and the prank would no doubt have passed into schoolboy folklore had it not been captured by Google Maps.
The red-faced principal said he would be contacting Google to plead for the image's removal but an internet privacy specialist said it was difficult to get such satellite photographs changed or blurred.