It clearly says "If you go fast in this area, you'll miss the accidentally porn scenes that's being filmed all around, so go slow and enjoy your walk". ... No?
or "if you go fast, you can cause a porn accident, so please, go slow" there are different options XD
Gotta love broken English! XD XD I'm sure they were the same guys who wrote this: http://imgace.com/wp-content/uploads/2012/09/trespassers-will-be-prostituted.jpg
I've seen this in a post where were other just as confusing signs, but this one surely takes the cake.
It's a trap!
Jani, you must resist! You don't want to accidentally be in a porn shoot!
hahahahahahahahahahha trap area
Accident prone* area