I have had the unfortunate pleasure of dealing with this before, contrary to popular belief you do not own the parking area in front of your house as long as it 1.5m (as stated in a previous post) away from your driveway it is available for any registered vehicle with valid insurance to park for up to 72 hours I believe.
Its best to try and resolve these things face to face but if they don't want to use the driveway just have it ticketed after its left out after 72 hours and that should be some good motivation
Speedy
1985 300ZX & 1991 300ZX