dodgerfan, ignore them. I got teased a lot as a kid for constantly having my nose in a book - I'm sure you did too.
Knitting is useful. I joke that if the apocalypse comes and we all get knocked back to subsistence-level living, I'll be doing better than most, because I know how to garden and cook, can, dry, freeze, and store food, and take care of livestock. I bet I could make soap if I had to. I understand the principles of carding and spinning fibers, and crocheting and knitting are just extensions of taking something from a raw material to something useful.
And I'm not a little old lady either - I'll be 34 in a couple weeks. I just grew up in dairy country on 27 acres, and the grocery store was 20 miles away, so we stockpiled a lot - and home grown is cheaper. Being out in the country, we didn't have more than one TV channel either, so I never developed the habit.
What use are video games or TV? You don't get anything out of them. Distraction maybe, but a lot of times it's a tension-making distraction, rather than the soothing one of knitting. And at the end, you have socks, or a sweater, or a gift for a loved one, and a sense of accomplishment.
Knit on, girl, and be proud of yourself.