OMG this drives me CRAZY! Why are people such selfish ignorant thoughtless arseholes?! Every home DH and I have ever lived in (6 in total in 30+years together,) has had a driveway. We have always ALWAYS ALWAYS parked on our driveway. We have had 1 car driveways and 4 cars driveways during our time together - and have never had more than 1 car. And we have never EVER parked on the road. We have always parked our car on the driveway. That's what it's for FFS!
Yet every single property we have lived in, we have ALWAYS had neighbours who park opposite our fucking driveway. Directly opposite (or still opposite, but just to the left or right of their driveway,) making it difficult, and sometimes nigh on impossible to get out. Whether we drive in and reverse out - or reverse in and drive out, it still makes it hard for us, and very awkward, to get in and out of our driveway. And these people have ALWAYS had their own driveway.
What kind of selfish, thoughtless, self-serving fucking arsehole parks on the road, when they have an EMPTY DRIVEWAY?! I remember on a thread about this some time back, someone made an excuse for doing this, by saying 'I find my driveway hard to get onto and off, and I go in and out 3-5 times a day, so parking on the road makes life easier for me.' Yeah great, so to hell with everyone else then, and the problems you're causing for them. Selfish arsehole! Learn to park on your driveway then, instead of making life awkward and miserable for everyone else! 
A friend of mine is having a problem at the moment with a family who live opposite.. (A couple with 3 kids.) Got 3 vehicles - 2 cars and a van, and a SIX CAR driveway. (3 across/2 deep.) All 3 vehicles are on the road nearly all the time, because they have closed the gate, and made their big driveway into a little play area for their 3 kids (aged 4 to 8.)
So my friend struggles to get in and out of her driveway most of the time! She has even tried parking on the road herself to try to force them to go onto their driveway, but they still park on the road, (with her car opposite,) almost completely blocking the road. Nothing bigger than a Vauxhall Astra is able to get through, and it's risking my friend's car getting clipped/banged into. Also, emergency vehicles and larger delivery vehicles can't get through!
She said she it will very likely be her door someone that will knock to move HER CAR, as they shut themselves in, close the blinds and refuse to answer the door! So the 2 times she has tried this, she's begrudgingly puts her car back on her driveway.
All this, because this couple can't be fucked to play with and entertain their children or take them to the park etc. They just prefer to turn their driveway into a play area and leave the kids there whilst they fuck off into the house and watch TV with the doors and the blinds closed!