Interesting. My usual answer to anyone who says, for ethical reasons, "I'm not sure if I should do <x,y,z>," is "If you are wondering, you shouldn't do it."
HOWEVER...
As writers, this is what we do. We see the world around us, pull things out of it, and make a story. Sometimes it is entirely made up, other times not so much. You pull from life, both your own experiences and those of others.