fully understand how you feel!! its disgusting behaviour!!
a few years back i had a plot on a private site, I dug the plot over and had some early things planted,, the owner of the site saw fit to loose his chickens out over my plot, when i turned up and saw it I was livid as well, his excuse was he thought he was doing me a favour?
![Huh ???](https://chat.allotment-garden.org/Smileys/green/huh.gif)
even though he had all my contact details where he could have contacted and asked...
next day I turn up with my shotgun and a box of paxo stuffing under my arm!! thelook on this guys face when i walked up to him in his chicken area and then handed over my notice of quitting the site with a bill for wasted seed was amazing!! just wished I had a photo.. funnily enough I recieved a cheque the next day for what I was claiming..