I wouldn't call anything he did unethical, but check out this interview with Gabriel Weinberg (DuckDuckGo guy) about his previous startup: http://mixergy.com/ga

I wouldn't call anything he did unethical, but check out this interview with Gabriel Weinberg (DuckDuckGo guy) about his previous startup: http://mixergy.com/gabriel-weinberg-duck-duck-go-interview/ http://mixergy.com/gabriel-weinberg-duck-duck-go-interview/ With all of the respect I already had for him, his candor in this interview gave me even more respect for him.