Hello 2016 Smart Fortwo owner, I used to have the same concern 
None of the info online provide any photo on the contact point between the jack stand and jacking point.
But after jacking up the rear to change the motor oil myself, I am less concerned now.
1. the pinch points are stronger than you think and Smart is relatively light weight (it can still crush you, so always be careful)
2. make sure car is on level ground, always use wheel choke and the jack stands are centered to the jacking point
None of the info online provide any photo on the contact point between the jack stand and jacking point.
But after jacking up the rear to change the motor oil myself, I am less concerned now.
1. the pinch points are stronger than you think and Smart is relatively light weight (it can still crush you, so always be careful)
2. make sure car is on level ground, always use wheel choke and the jack stands are centered to the jacking point
