Addiction isn't typically construed as mere dependence or devotion. Our taboo of addiction stems from the negative consequences of maintaining the object of dependence.

Forsaking all news sources except HN is narrow-minded, but not a good example of addiction. Spending hours refreshing, and replying to all the comments to the point where you are neglecting other responsibilities: addiction.

edit: oops, redundant reply because I had this open for 30 min & didn't refresh before replying.