Utility in bitcoin derived from popularity had to be established before someone proposed centralized influence in the name of social "justice." People prefer freedom to coercion.
 
The implementation of taint means groups would wage an endless struggle for privileges. Everyone would want to have direct access to this power of forcing their subjective view of what actions ought result in a tainted coin and what ought not. The system should wash it's hands of such judgements of morality.

If such interventions are imposed, the utility derived from liquidity and popularity will be outweighed by the loss of utility from being "tagged and tracked"--especially if for taxation purposes. I can see the code base being forked and more robust systems created.