In a larger sense, addiction is a vice and should be eradicated from our lives. Indulgence is one thing; it is a controlled allotment of a specific activity. No so for addiction, which worms it slimy way into all sorts of corridors in one's life, without the victim being aware. So that when they try to stop indulging, they find addiction staring back at them with it's creepy jaws and pulsing eyes, ready to swallow self-control and virtue into it's gluttonous belly.
Okay, enough dramatization.
We can all agree, I'm sure, that there is a line between indulgence and addiction, though. I indulge in a cigarette once a month. I am addicted to a pack a day. There is a distinct line of self-control there. The question is, what constitutes as an addiction? If it does one no harm, is it still addictive?
An object like chapstick. I need my chapstick. I wear it all day. I reapply my chapstick at least five or six times in a day. If I do not wear my chapstick, my lips become dry and chapped. Now, I'm fully aware that in ancient times people did not have tubes of chapstick that they indulged in to the point of addiction. So I know that it is not necessary for my survival. I also know that if I stop wearing my chapstick, my lips will become chapped for about a day -- and then the chappedness will go away. My chapstick is not necessary. It is an addiction.
But, it's just chapstick, now. Must I quit it?
One can always argue that "Too much of anything is a bad thing." But that argument is exactly my point. Too much of anything causes addiction, which is a bad thing. Otherwise, there stands many exceptions to the rule. Too much chapstick isn't a bad thing. Except that it's an addiction. Using eyedrops too often isn't a bad thing. Except that it's an addiction. Blogging for progress isn't a bad thing. Except that it's an addiction. Etc, etc, etc, down the train to infinity.
So, what's the Piper trying to play?
Addiction is not necessarily a life-ending occurance. One can be addicted to numerous things and not be aware. So, perhaps, we need to take a closer look at our labeling of it as a vice, and our labeling of people with severe addictions as unvirtuous.
I think addiction is a bad thing psychologially speaking. If you can become addicted to chapstick (to take your example) then it's sure that you are an 'addictable person', and you can become addicted to other things, too, things that may harm you.