Do you think it is a requirement for ground crew to have passed their driving licenses before being allowed to tear around the ramp in v. close proximity to expensive aeroplanes?. . When I was doing my I.R. I watched a chap remove the steps from a 757 and then pull away and ram them into the tailplane! The a/c was u/s for nearly 4 days after if I remember correctly. EXPENSIVE mistake. Also a friend told me rescently of an incident where some steps were speared into the rear fuz of the BAe146 he was flying damaging the APU exhaust! Minor incidents with expensive results.