Rapists absolutely deserve to be killed. In a revolution this would be done for certain. Unfortunately, governments run by Capitalists will not enforce this rule; even if they list out in a legal code that someone who sexually assaults a woman should be punished with death, rich financiers will find ways to fool people, or evade laws, or get light sentences.
The world of the bourgeoisie does not even spare children, forcing young girls of nine and ten into the sordid embraces of wealthy and depraved old men. In the capitalist countries there are brothels which specialise exclusively in very young girls. In this present post-war period every woman faces the possibility of unemployment. Unemployment hits women in particular, and causes an enormous increase in the army of “street women”. Hungry crowds of women seeking out the buyers of “white slaves” flood the evening streets of Berlin. Paris and the other civilised centres of the capitalist states. The trade in women’s flesh is conducted quite openly, which is not surprising when you consider that the whole bourgeois way of life is based on buying and selling.
-- Alexander Kollontai, Prostitution and ways of fighting it, 1921