I mean wow. Go libertarians!Offering to feed peoples children, on the condition that they convert to christianity would be wrong. Offering a woman who is in the wilderness with a broken leg a ride to the nearest hospital, on the condition that she give you a blowjob would be wrong. Offering someone whose family is starving $2/day, on the condition that they work as slaves for you is wrong.
I have a theory that it's impossible to prove anything, but I can't prove it.