My general approach is "play nice".
Having said that, I'm reminded of an incident at work many years ago. I worked in presales for a company selling network equipment (when it used to be complicated and expensive). One of my roles was to approve returns.
One day the sales admin had a customer on the phone and shouted over to me describing what the customer said the problem was. My response was "It sounds like a case of RTFM". She immediately asked the customer "Is it a case of RTFM?". Apparently the customer was sport enough to laugh and say "Possibly, I'll have another look"