It's "risky" because Naltrexone doesn't work for everybody. I don't know anything about you personally, but if a "recovering alcoholic" who has been "sober" for awhile decides to use Naltrexone to help him or her moderate, and it doesn't work, then they risk the chance of falling right back into the alcohol addiction per the "Alcohol Deprivation Effect" (ADE) that Dr. Sinclair writes about. This effect is basically this -- the longer an alcohol addict (rat or human) goes without alcohol, the more likely it is that they will drink even heavier (at least for awhile) when they begin to drink again, and their addiction will pick up right where they left it (even if they've been in prison for twenty years!). TSM eventually eliminates this effect through a (hypothesized) alteration in the actual neuronal structure of the drinker's brain. That's what I meant by "risk"; it's not a risk in the terms of actual danger. Another thing to consider is the wide variation people have with Naltrexone. Take me, for example. As I mentioned in my post today, I'm a success story, yet drinking with Naltrexone isn't actually that pleasureable for me. I used to LOOOOOOOVE how alcohol made me feel, but it's pretty much either BLAAAAH or YUCK now, which is fine for me. Many others can't tell the difference and continue to drink at high levels. I guess the minority of people find the "sweet spot" that you seem to be seeking -- being able to take a pill that (a) allows you to control your drinking so that you drink in a controlled manner while (b) enjoying all the (very real) pleasures of alcohol and all that goes with it (bars, parties, romantic dinners, etc...). The odds are stacked against you on that one, but it's up to you whether or not you think it's worth the risk.
Buying Naltrexone online --- whether it's ethical or not, India has many brilliant scientists and chemists that are able to produce exact replicas of pretty much any pharmaceutical. If you buy online, I believe most of it originates in India. I can only speak for
http://www.alldaychemist.com; a little bird told me they sell Naltrexone (which they call "Naltima"). It's about $1.75 per pill, plus $25 flat shipping fee regardless of quantity, and takes about two weeks to arrive. If you're "caught" with Naltrexone without a prescription, I don't believe it's a crime or anything, as it is not a controlled substance due to its non-addictive qualities and safety record.