Not everyone is capable of truly becoming addicting.
It's a personality trait that, thus, is hardwired into your brain. Shielding such a mind from the start is about the most effective anti-addiction method.
I should know. I can, and have, become addicted to just about anything if I like it enough. Alcohol, while I like, I've successfully avoided ever becoming anything more than a weekend alcoholic. And enough terrible mornings (and days, and nights) the next day, binging to the point of puking before even making it home, etc etc etc... help keep me in control of alcohol at this point. I like it, but it's the one thing I think is impossible for me to become addicted to. Thankfully.

My uncle, whom I think I got this damn addiction gene from, lets it (addiction in general) control his life. He's a wreck, and I hate saying it but I'm basically glad I never see him.
If I didn't have a drive, I could easily see myself on that path. It's a trait that has led me to some experiences that I will forever be thankful for, and gives me some damn good insight into the human psyche, but at the same time, I definitely need to get a better choke-hold on that part of my brain. Thankfully most of my "addictions", the ones I basically willingly keep (I do get around to fighting ones I see may have potential harm in some fashion), are generally harmless.
Once I get out of school I'll have a chance to seriously rework myself, half the reason I've had senioritis since almost the start of school. Have a new home, a regular work week, fellow Reservists to take care of... that's a chance to set completely new rules, plus... it's kind of a do it or fall by the wayside thing, and can't do that.
School is a terrible environment for me, I hate learning unnecessary shit (i love learning, and hell, I do love learning unnecessary shit, when it interests me at my choosing - though a lot of that unnecessary learning has proven extremely useful in everyday life), but most importantly... I dislike this time. Too much of it, too often left with idle hands.
People with addictive personalities need damn good friends who can kick their ass if need be, and have to learn themselves and when to say enough, I need help. And not only that, but realize what they just start getting into, while it may feel great and make every day enjoyable, might be something they struggle with a year down the road. And if that ever crosses the mind, they at that point should make use of the clear head they still have and abandon the potential addiction before it reaches that point.
On that note...
I should have never built my first computer. :biggrin:
But I will say, there are things that I shouldn't do that I just don't care about, and then there are things that I feel I'd really enjoy trying, and have had the opportunity, but I blissfully ignore that opportunity fearing what it could mean later.
Addictive personality types can never rid themselves of that trait. Their CNS is just wired that way. But it's also not an excuse, I'll never use it as an excuse that's for sure. For them, their brain feels clear before and after, but they are mentally altered quite a bit with an addiction. It takes a person with that personality to realize that the truly happiest life they can ever hope for is if they just turn away from potential addictions before they ever start. Sucks in the here and now, because that might mean that one night of fun has to be turned down, ignored... a weaker mind will argue it can't possibly turn an entire life sour due to one night, but for that personality type, that's a risky gamble. Sometimes you can keep it to just one night, maybe two nights... and that's it. Often times, not quite the case.
Basically, it takes someone with an addictive personality to realize they have an addictive personality before they have a harmful addiction. That is a very hard thing to discover. Humans learn through mistakes... for the addictive personality type, their best chance at a successful life is learning a major life lesson through an easily forgettable mistake that brings no harm whatsoever. If they have luck, it'll be multiple minor mistakes that help teach them, before it ever turns into the one mistake that ruined their life.
I don't know if it's a part of the addictive personality or not, but throw in stubbornness into the mix, and the odds are nearly stacked against them after a few mistakes.