Strictly a guess but maybe someone you've had a tiff with in the past trying to exact some retribution???? It could also just be some 14 year old in his parent's basement who gets his jollies by messing with random sites and you were just "lucky".

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.