They never had any problem if I chose to watch TV socially instead of spend time alone. However, I rarely watch TV simply due to the lack of stimulation and interaction, not to mention the amount of garbage that is broadcast these days, unless it is in a social environment.
I have tried in the past to convince them of the benefits of what I am doing, but they simply refuse to acknowledge "computer time" as independent educational exercise.
This is why programs like the FIRST robotics competition (http://usfirst.org/) are so important: they give engineering/programming some of the competitiveness and glitz traditionally reserved for high school sports.
I drove my high school's robot for 3 years at FIRST competitions around the country -- way more exciting/educational/fun/memorable than playing for my school's soccer team (my other extracurricular).