its actually called an ''auto loader'' i operated one for the first 2 years i drove a tow truck. couple things you can do to buy yourself more time
cut your wheels when you park, leave it in nuetral so he has to use tow dollys (takes a while to put those on) even when he tries to yank it out he will end up hitting the car parked next to yours.

always put nose in if you have a front wheel drive, never leave your drive wheels exposed(we always tow the drive wheels so you dont fuck the tranny up) even if its in nuetral it will still damage the tranny
now these are all for auto loaders flat beds are a little diff but still use those measures
by removing my tow hooks it takes that much longer to hook up to it with a flat bed