Always viewed addiction as some sort of genetically induced illness, personally my dad and my son have always had significant problems, and I have to fight those tendencies(I have been successful)..
Moving away from that anecdotal evidence I spent a career in Corrections, it seemed as though "apples never felt far from the tree", gotta wonder who is the "carrier" in the Reid family. No judgement of the Reid's, just something the kids/grandkids need to be aware of.
If you have those tendencies you always need to be aware, and if you choose to drink never get behind the wheel of an vehicle.