Do not underestimate the amount of determination or free time available to an unreasonable client. If they were able to do cost-benefits analysis and good-faith

Do not underestimate the amount of determination or free time available to an unreasonable client. If they were able to do cost-benefits analysis and good-faith estimates of the value of someone's time, they probably would not have made a request like this to begin with. In short, do not expect reasonable behavior from unreasonable clients. :)