The wife of any criminal would deem it a boon to be protected from the offspring of such a man, so would society.
If he is not married, then society must take the risk, and it is not very great.

The women who will be his companions will be either sterilized by disease or by tubo-ligature, because they are defectives.
This protection from the progeny of defective men, though not absolute, is complete enough for all practical purposes.
If all defective women and the wives of all defective men are sterilized, a greater improvement will take place in the race in the next 50 years, than has been accomplished by all the sanitation of the Victorian era..