Why the Fallowfield Loop flatters to deceive

The beloved 'Old Faithful' of off road cycling in Manchester - the Fallowfield Loop - has loads going for it as a bike / horse / jogging / dog walking route. The main attractions are of course that it's traffic free and for the most part is soundly surfaced.
It's pretty quiet, isn't covered in broken glass as you might expect and seems to be mostly populated by reasonable people.
But why oh why I ask you did the people responsible for it punctuate its entire length with a series of ever more elaborate barriers which serve no purpose other than to force cyclists to stop, get off, swear and blow their cheeks out. Oh, they also provide blog material too! I think there are about 16 of them in total.
I initially thought that they were there to stop the local scamps driving 'souvenired' cars and motorbike along. But, in a blinding flash of logic, it struck me that, if this were the case, then the barriers would be at the path entry points - on the side  - not blocking the path.
Another really annoying element is that they are all different. I usually celebrate difference and shun uniformity but its like they have been designed to specifically make it trickier for riders to get to the other end.
The worst protagonist is about 2/3 of the way along - travelling east - just before Gorton Cemetery.

As you can see in this picture, it's a reet pain for cyclists but its anatomy has changed a bit recently. The local scamps had managed to remove the top bar of this hilarious obstacle making it bunny hoppable. It was bliss for about eight weeks until some guys with an arc welder removed the bottom one and raised it back up to the old height - and painted it yellow.
If there is a more un-cycling friendly barrier on a cycling path anywhere on the planet then I don't want to know about it. Shite.
The sooner these things go the better for everyone...
Ride safe