my asshole neighbour blocked my drive way - i can't get my car out now and...

[claudiacake]

Probably a little of both. Throwing water on a cat won't hurt it. Your neighbor can call the cops on you for your noisy dog at night, though. So far he has not damaged anything belonging to you. Why would you consider vandalizing his property as a proper and adult response?
Could it be you are not proper and adult?
Tiffs between neighbors often get out of hand, but.....if his vehicle is actually parked on your property and impending your access, then you can call a tow truck and have it hauled off your property. You probably need to file a complaint with the police, first, though. When your neighbor returns, his vehicle will be gone, there will be a card from the towing company, and he will have to pay to have his vehicle returned.
Take pictures of the area and the location of his vehicle and how it blocks your access to your driveway.

Expect the war to escalate.

[AshelyB]

Yea he is. Call a tow truck and have his car towed. I believe it is against the law to block someones drive way. That would teach him.

[CandyG]

assuming you are in the UK, if he is blocking YOUR drive way, that is a legal drive way, with a dropped curb then you can call the local police NOT 999 number and ask that they come and deal with it, tell them you need to get to work and he has YET again blocked your drive.

And sorry as for your pets [dog owner here as well] it is mind numbing to hear a bloody dog bark half the night and where your cat goes and sits means that it is probably pooping over there as well so I would hose it down as well............