Jacking up front of car in one go on subframe-dangerous?

[Dum-Dum]

I always use the rear lip of the subframe to put the stands on by where the bolts go through as the contour suits my strongest stands perfectly.

I have jacked the whole of the front of the car by the sub frame before but your likely to deform it slightly and unless you get the jack perfect you might find it very easy to unbalance the car.