Confusing the tourist - by turning signs

This signpost in the town of Stone, with its directional signs, looks innocent enough - except that every single sign is pointing in the wrong direction.
Clearly some mischief-makers thought it would be fun to confuse the poor visitor by turning them all the wrong way.

Strangely enough, it's relatively easy to do this, as the collars on most posts like this are not locked into place, and once loosened, can be rotated.

I wonder if town authorities shouldn't consider something more sturdy.
The reason I say this is that I have now realised (after many mistaken, er, misdirections), is that this type of mischief-maker lives everywhere. So much so that I gave up following signs on Staffordshire's rural lanes, and had to buy a sat-nav in the end, as I was continually getting 'lost'!