This question may be a better, more valid and comprehensible, way of analysing moral difficulties and dilemmas than the more usual method of establishing and assuming some general principles or rules, and trying to reason logically from then to the specific situation - in light of other established and assumed principles... which method rarely seems to work in practice, and rarely seems to convince impartially, except in simple and extreme cases.
Is capital punishment (execution) acceptable - if so, by what method? Is torture acceptable - and if not, then what level of coercion counts as torture? Is it acceptable to charge interest on a loan - and if so how much and under what situation?
Such matters can perhaps be clarified by assuming that you are dealing with a loved member of your family. This is the most relevant consideration because it is the exact situation of God in dealing with Men - we are all, and without exception, loved children of God.
If we can imagine ourselves as an ideal parent, dealing with problems among our children - perhaps we can see what is acceptable, appropriate - and the reverse.
In doing so we need to bear in mind that dealing in a loving fashion with one's children does Not etail letting them do what they want at this moment - especially Not doing what they want To Each Other.
being an ideal loving parent Does entail being tough at times, using coercion at times - it Does entail making the best of an often very difficult situation in which time, resources and effort are all finite. It Does entail often feeling great sorrow for what must be done, what ought to be done.
Tackled in a fashion that combines realism with practicality; I think this parental approach to life answers many, perhaps most, of the moral dilemmas and cruxes I have come across.