I think I'd say: it's an excellent default practice; just be aware that there are people out there who will... game it to the point of destruction.
The hard part is telling the difference between those who abuse it accidentally, in ignorance, and those who know full well what they're doing. At some point, we have to stop turning the other cheek and reaching across the aisle -- but drawing that line is in itself a kind of surrender to darkness; the innocence saved needs to be worth the innocence lost.