They had no qualms about accepting the proceeds of a trust fund that was bequeathed to them, part of which included shares in Phillip Morris - a company that manufactures tobacco products like cigarettes.
See the following thread: http://www.jehovahs-witness.com/topic/54708/watchtower-cigarette-company
So to answer your question, I think they'd accept your hypothetical cheque without batting an eye. It costs a ton of money for the upkeep of a Pedophile Defense Funds these days!!