I've never refused, but I do always outline the (usually low four figure) cost in time and legal expenses required to review the contract. I close by explaining

I've never refused, but I do always outline the (usually low four figure) cost in time and legal expenses required to review the contract. I close by explaining that I cannot in good faith enter into an ostensibly binding contract without some form of consideration from my counter-party because such a contract would be difficult to enforce in any case. HR never knows what to do and usually just never gets around to replying to the email.