RE: Standing position for take off
The act of having to stand behind the plane to take it off is not, in and of itself, unsafe. BUT...common sense says that if said pilot NEEDS to do this to take off, he is an inherently unsafe pilot, who is probably NOT able to control his plane at ALL times. If he can't demonstrate the ability to take off from behind the dead line and in an approved pilot station, he should NOT have solo flight priviledges.
Regards,
Astrohog