Plant deterrent for nuisance children?

I need ideas for a thorny shrub or something of the same deterrent to plant along a shady fence where the neighbours feral children choose to use a bin and my car to climb over to retrieve their balls because there is a gap in the conifers on the other side, any ideas anyone?
Failing that, i wonder if barbed wire would have the same effect? Or maybe nails screwed into the top of the fence???

 

Berberis? We have one and it's quite spiky.

 

In the absence of a sawn-off shotgun, what about a berberis?

 

Lol fidgetsmum! Yes maybe the presence of my other half and his air rifle would make them think twice about getting too close to my baby (car) Berberis is a great idea, how high does it grow? The taller the better really, then they wouldn't be able to use the bin to get a leg up. That side of the fence really doesn't receive any direct sunlight though, is that a problem?

I hear berberis is good for the wildlife too so great thinking guys!
Grr doesn't it just make you mad though, it only takes one family doesn't it to ruin the street :(

 

Triffids

 

Mahonia isn't to pleasant to fall into =] and is bomb proof

 

Thank you marley I don't need it to be that high but that's another great suggestion, thanks.

Here's a picture guys so you can get the idea of what they are doing and the space i have available for a lovely thorny specimen, i was thinking of planting something in that wasted gravel space anyway but now i know i need something to keep the little terrors off my property.

The fence is quite long but i can only plant about the width of my car, the rest of the neighbours cars park along there too!

 

Oh yes, we have a quince too, and that attacked me last weekend!
Our berberis is about 5-6' high. Very pretty too. Don't know what variety it is, but it's got reddish brown leaves, and very pretty flowers.

 

or even Broccoli perhaps?

 

Ooh I've gone from woman on a mad rage to an excited screechy girl at the thought of picking myself a new mini hedge! :D

Wow all those suggestions, thank you marley! Ill have to make sure i keep on top of pruning and also to park my car a bit more forward so as to avoid thorn scratches and to limit choking it with exhaust fumes lol.

Which of those would i be able to plant asap? I quite like the hedge you get on roadsides with all the blossom, is that hawthorn or blackthorn? Excuse the newbieness :S
Whichever is the prickliest and would look the most at home i guess will be the choice winner, thanks so much for all the suggestions!

 

Pyracantha is very attractive with white blossom in the Spring and orange berries in the Autumn. It has killer thorns - I know because I've been pruning ours - so leather or other thick gardening gloves are necessary for handling whilst planting. You could order one from a catalogue or phone your local garden centre to see if they have one in stock. Marley's suggestions are just as good, I just happen to like pyracantha!
The blossom in the hedgerows now is blackthorn - hawthorn comes out a bit later on, end of May I think.