A year or so back I got told by a farmer who jump out of his Land Rover at me to keep off of his land, I explained I only ran in the strip of land around where crops were planted so wasn't doing any damage he then told that was now set aside land under DEFRA rules and the public weren't allowed to use it as a path. He then went on to tell me that his game keeper would have a word with me if I ignored his warning, I then laughed, he said why do you find it funny I said I normally wave and say hello when I see the game keeper
I must admit I never check whether what he told me was valid as I could keep to plenty of waymarked paths in that area anyway.
As for geese my mum used to keep them, best way to fend then off is to bend forward arms together as if you're a bigger goose, daft as it may sound it does work.