Dangerous? Compared to what?
I really have to disagree with audboogie. While it seems crime has increased in the DR recently, I'm not so sure that impression isn't more a result of the rapid dissemination of "bad news" through the internet and other media than it is a true reflection of the crime rate. In any event, it is certainly safer than many other places in Latin America, and some in North America for that matter.
During multiple vacations to the DR, the only times I have ever ENTERED an AI resort were for the occasional dinner at the restaurants in Puerto Plata Village. I avoid getting falling-down drunk and use common sense. The only crime I've encountered personally has been having my heart stolen a couple of times, and I have no complaints about that whatsoever!
There are many, many DR1 expats living there, and although some live in gated communities, most do not, and those who do still live and go about their business in the community. Some bad things have happened, and they are discussed a lot, but that doesn't mean it is a particularly dangerous place to live or visit. Bad things happen everywhere.
If someone's idea of a vacation is to lay in the sun til they get skin cancer, drink "free" booze til they get cirrosis of the liver, and eat bad buffet food til they are morbidly obese, by all means they can spend all their time at the AI. Maybe even get "adventurous" and take a "monster truck" excursion. Sorry, not for me. I'll "take my chances".