I would also note that abolition is perhaps the only socialist principle proven to be susceptible to moral example. In Sandinista Nicaragua, where thousands of Somoza's victims had every legitimate reason to exact revenge from their tormentors in the wake of the revolutionary victory, Tomas Borge's refusal to allow the execution of the guardsman who had tortured him and murdered members of his family was sufficient to prevent any application of the death penalty.
The issues of crime and punishment actually are among the easiest to discuss with ordinary people, and lend themselves to the type of hairsplitting posted here only among intellectuals, or perhaps also lawyers and elected officials. Furthermore, counter-intuitive examples [to people schooled in ritual anticommunism] often lead to useful discussions of more fundamental political issues. For example, the demonized German Democratic Republic not only abolished capital punishment; it also periodically emptied the prisons of all but the most serious offenders (usually Nazi war criminals). Why can't we do that here?
Ken Lawrence