But who decides that? Where is the arbitrary line drawn? Will it be the same as this 18 law we have for everything? or 21 in America? Will it be 12 like consensual sex is in Arab countries? For example would you say a person who is highly lazy be killed/sterilised? or just extremely lazy? What is extreme and highly?

Nobody can decide these things exactly. It's all subjective and relative.

For that reason I go with the mass bombing of religious people. lol nah um. I'd probably combine e and f. Then when the population goes down too much we can relieve it a bit. Maybe allow sperm banks etc again.