know how u feel mate, mine was on my parents drive for 3 1/2 yrs and i stupidly didnt cover it the day it was taken off the road so everyone and his mother could see it!!! I moved house 3yrs ago and my parents had loads of people knocking on the door asking about it, and 1 of them i knew and is/was a known theiving cnut!! I told them to tell whoever knocks on the door tell them the cars off the road cos the engine blew up and is out the car being rebuilt!! Not gonna stop them trying to take it but might put them off if they beleive it, althou it was true as i rebuilt a new engine for it and replaced it before getting it back on the road at xmas!!
Also had someone try and break into my dads car which used 2 get parked infront of it at nite, so at that point i did what people have said above, put it on full lock and removed the steering wheel and front left wheel and dont think that anyone bothered them after that.
Its proper shit and makes u feel sick when u hear things like that, least i know we got proper nosey neigbours where we live now, had 2 come out the other night having a moan at me for moving the car at 11pm making a bit of noise as the idle control valve is buggered so have to keep the revs up for the first 5mins
All i can do is move them mate or make it as hard as poss for them to get at them, least then the if u give them the only option of using a hiab they can attract alot of attention!!