Who blows the whistle — a loner or a well-liked team player? Which of them is more likely to lead a successful opposition to perceived organizational wrongdoing? The potential influence of co-worker pressures to conform on whistle-blowing activity or the likely effects of whistle-blowing on the group have not been addressed. This paper presents a preliminary model of whistle-blowing as an act of nonconformity. One implication is that the success of an opposition will depend on the characteristics of the whistle-blower (...) and how the complaint is pursued. Specific hypotheses and general suggestions for future research and practice are offered. (shrink)