If you are living under the radar (not paying taxes) you would be okay, but if you are filing taxes every year the IRS will penalize you at tax time. They will take all or a portion of your tax return. You can thank Obama for that. I went without health insurance for a few years before this law came into being. I saved a bundle. Luckily, I did not need health care during that time.
All insurance is a scam, but it's a necessary evil. If you ever get into a major accident, the hospital bills would be astronomical. Here's an example: My friend had an appendectomy last year... 2 days in the hospital... total cost = $70,000. I had mine appendix out in 2002 and it was half that price.