So I decided to write the client a lengthy email to explain that I decline the offer for personal reasons. And it’s so incredibly difficult to write a neutral letter without coming off as an asshole when you read the stuff above just minutes earlier.
I’ve had similar experiences. For example, a guy who wanted me to help fund his compression algorithm that could achieve 99% additional compression on any already compressed photo with no data loss. I must not be as nice as you: I flat out told him he was insane and did not respond to the equally insane rants, accusations, and threats that followed.