I have often said it myself in received pronunciation when I had a mere acre of Devon and caravan tourists came on it with their dogs. I can do a Debbon aahcsent tho' if need be. Yew gro'ulls gerrof moi lahhnd!
The said acre was opposite and across the estuary from the CTC (Commandos) Lympstone and some nights there were furtive figures on my land pretending to hide.
I would say quietly not shout "I know you are there but this is my patch but I think you would fool most so I will retire".