Yonks ago, in another place, a certain OH mentioned that due to door slamming, he removed all the internal doors from his house. He only replaced them when they guaranteed that all doors would, in future, be gentle use of the handle.
It worked.
My youngest (13) is currently slamming her door - and the same will happen, albeit with the addition of a bonfire in the garden in which the door is burnt along with "her" mobile phone, laptop, LCD TV, stereo, I-Pod and any clothing on the floor.