Currently, they would have to finish building the TH350 on the table in the garage, put it on the jack, install it, and then figure out the tcase shifters and quirky carb. If they get that far, I'll probably come by or hear them before they're done. In which case, I will quietly hold them at gunpoint, thank them, then hog tie them in the backseat. I may decide not to leave them 150 miles from a road in the middle of the NV desert due to them finishing my tranny, but I sure as hell will scare them!
"You got a purdy mouth son, now get in the back and squeal like a pig!"
Vandalism concerns me more than anything. I had my window broken out in a nice neighborhood by some dumb highschool kids a couple years back. We took a ride and found them breaking into other vehicles a few blocks down the street. Tried to call the police, but they wouldn't show up even when the kids pulled a knife. My buddy's girlfriend wouldn't let me out of the back seat (damn suicide doors). Stupid kid pulled a knife, waved it around, and then threw it at our car.

Had I been able to get out and beat the **** out of him, I would have thanked him for disarming himself.
Surprised I remembered this after 9 years.
http://www.stickdeath.com/2002auto.html
http://www.stickdeath.com/frameset.htm