Good stuff. My last comment - the relative offensiveness/effectiveness does not factor into the moral value. There is no way to measure which label is more hurtful instrinsically - they are hurtful at different levels for different people at different times. What we perceive as "intrinsically" more hurtful is dependant on the sales job and social context of the labeller.
There is no intrinsic moral difference between a drunk driver who makes it home safe and a drunk driving who maims another person - the moral worth of drunk driving is equal regardless of practical effect and harm.
Politically, labels are used weapons designed to supress, minimize, and remove dynamic individuality - on both sides. Equally morally defficient, some with greater practical effect and harm.