Ethics, Ethics Everywhere You Turn

I often wonder if there are any industries out there in which ethics DON'T play a part. Running a small proofreading and writing agency, I am often amazed at how many times I run into ethical delimmas each week. A PhD candidate that wants someone to write their thesis for them. A high school student that wants to ensure an "A" on their history paper.

These are the questions that face those of us in the proofreading and writing world these days. What would you do?