No. At best give a hint or make a joke comparing you to those lawyers that they seen in movies winning lower prices/fees for their clients. If they get the hint and / or act accordingly it boils down to what kind of person they are, but in no way make them uncomfortable by bringing this ever again. You may lose them instead and it's preferable to do repeat business instead.

People joke developers are a very special breed of deer easy to get scared and lose focus when working. Tell you from experience, clients of developers are the same, but in their case you lose their wallet / business they bring. Personally I prefer to have long-term relation to my clients.