Heh I even got kicked because of dropping jeeps on peoples heads and I'm pretty god at positioning jeeps so they fall on the edge and than on some fellas' head - snipers hate my guts. Once someone was climbing the ladder on Ghost town, to get the Uper South side flag and i dropped a jeep right when he got to the top and he died - commnetar from the bloke - ''Admin kick the enemy commander for he is dropping jeeps on us all the time'' - what a whimp.
Droping supply crates is a little more difficult, coz' they don't fall in a strainght line.
Oh and about killing armor with vehicles - done that but it's easier to kill someone who is caping a flag in a jeep and drop another one on their head, tanks get a lot of damage but not always die.