For a measured approach I'd say kill his pets then petrol bomb his house.
I dunno about that, the fire might get a bit out of hand and end up pulling in 3rd parties, you could be in for a world of legal wrangling then. I suggest you just cut his eyes out with a rusty jigsaw blade and force-feed them to his children or something. That'd do the trick.
On a more serious note:
I know how annoying it can be when people park right across the road from your drive like that, sure it's quite possible to get in and out but it does mean you have to do a load of extra manoeuvring you wouldn't otherwise have to, which is indeed inconvenient. If I have 2 particular dislikes (actually I have thousands, but I'll stick to two in the interests of staying on topic), it is inconsiderate people and being inconvenienced by them. If there was no other obvious choice with regards to parking, it wouldn't be such a big deal, but when they clearly do have a choice, I agree, it's very annoying and it makes you wonder what the hell they’re thinking.
Stop moaning... he's perfectly entitled to park there!
Ok that's it now, I have read just one too many "stop moaning" posts today, the man has a perfectly legitimate grievance, yes, maybe they are entitled to park there, but if they do not have to and they are making life more difficult for him by doing so, then do you not think, in the interests of good neighbourly relations and human decency, that they should park to the side a little?
...is that so much to ask?
I mean what is it with people like you? ..."stop moaning, don't whine, don't whinge" yadda, yadda, yadda.
Some smart alec always finds the time to add that to a thread like this. We're British for god's sake, moaning and griping is part of our culture. It gets some of us through the day in at least a semi-sane state and stops us exsanguinating people who annoy us, such as you. if you don't want to read it, don't!