shut the bloody gate/parking/dog walking

[ThePrisonerOfAzkaban]

Yes a aibu with those lovely 3!

I live in a house that is on its own in the middle of field, the house has a long drive way about 1/4 mile you can't pass another car on it, big drops on both sides. The house its self is cut into the hill so it has several levels. There are 4 parking spaces, 2 right out side the front door and another 2, the second level down. If you park like crap on the lower level you can't get the cars out from the front of the house.
Now the person who livid the house before us didn't drive and was the type to say to people come and park and mine and take.the dogs for a walk. The driveway it's self runs next too a footpath, it's not actually the footpath that's the field and not the drive, the footpath continues up the hill past the house. Anyway we've been getting blocked in ever since we've moved in with people parking in our private parking spaces, or just on the drive it's self. Notes/asking people not too doesn't seem to work. It's a popular dog walking route so it seems. So we put up a gate at the bottom of the parking spaces, people just open the bloody thing and still drive in, we've got no parking signs up the works. Or if they have walked up the drive just leave the gate open. We can't really lock it as there is no where to turn around for the Postman/partners clients works from home/or the farmer for his fields.
Aibu to just go out and puncture there bloody tyres?

Liking the sticky labels and charging for parking ideas.

Point out to our landlord that if it continues too long it may create a right of way that could future affect the value of the property I old expect that to create more robust action.

Are they just walking up your drive and back down rather than using the footpath - or do they walk up your drive and can get out somewhere else into the field and continue on? If the latter, is there any chance you could do something with the access onto the path they are going from the driveway into the field from? Alternatively you might want to do some 'gardening' with a scrub cutter and improve the access to the footpath to make that seem slightly more attractive? I would definitely try blocking them in when you find they are there too...

The footpath runs the other side of the ditch that runs next too our drive, the footpath goes up though the hill and meets at the same point at the top our private path does. Tbh I don't mind them walking up past the house and using the drive away it's the parking and non gate shutting that does my head in.

I agree with mistle. I think you need to cut off access from the top of your path/drive to the footpath. Make it less desirable for them to park there if they have to then walk back down to join the path. Also makes it more clear cut that it is private land with no right of access. I think you need to go zero tolerance for a while.

Is there alternative parking on the road they can use or do they have to park on your drive to use that walk?

So people are using your drive/parking to then access a footpath?

How do they get from your property to the footpath? Rather than focusing on preventing them using the drive which seems to have all sorts of difficulties can you make it really a hard for them to access the footpath from your property? Barebwd wire/rose bushes etc? If you can make it so it would be easier to stick to the proper footpath than to go via your property that might help the issue?

Also, you mentioned that if they parked like arses they blocked you in, would marking out parking spaces help?

I think making it impossible for a couple of weeks would do the trick. So put a padlock on the gate, give a key to the farmer and put a postbox at the end and tell clients to call when they arrive and you will let them in. After a couple of weeks the people will probably have found somewhere else to park and if you keep the padlock on there, but unlocked they probably won't bother to try it, especially if it's as hard to reverse from as you say.