Wally isn't always (but most of the time IS) wrong to refuse to do the work.
I had just finished the safety course for new employees that showed me just how many ways you could kill and get killed on the job by ignoring the common sense: "If it sounds wrong, don't do it until you ask for clairification".
I was tasked to make a software modification to bypass gas flow, pressure and temperature limits for a piece of semiconductor process gear that could result in potential explosive results according to the company's process documentation.
Pointing out the conflicting document and the engineering change request, I asked for clarification UP the chain of command. That only brought pressure to "comply" from marketing and dept heads. Asking for an exemption sign-off signature from the safety group and having them refuse resulted in a stalemate and the project died. Didn't make any friends in high places.
Whenever I am handed a technical specification that allows for multiple interpretations, I like to write each on a scrap piece of paper, put them on the wall of my cubicle, and throw a dart...
Wally has great ethics. To do nothing is the best way to prevent producing products that could do harm to the public. To ask for 'Clarification' is just asking for more BS.