Anyone who says harvest as you are soon to find out by many here is thought to have misplaced their testicles.If you don't say kill you are far less manly!
I say know your audience and respond accordingly! I personally don't like the word harvest,because harvesting to me seems like what you do when you are dealing with fruit or crops.I will say taken,or got,or shot in the company of people where I thought using the word kill may be a bit difficult for them to take.Just trying to be polite or considerate.