All of your scenarios present a choice. Obamacare does not allow for options. You WILL buy health care. If you don’t have enough money for health care and drugs or gifts, that’s just too bad. Welcome to the new normal.
But the reality is that only the responsible working young person is likely to be fined for not buying the product.
They can't fine the druggie because druggies have no income with which to pay the fine, other than public assistance or what they can wring out of their parents.
They can't fine the illegal alien, either because they get an exemption, they can't find them or they don't want to find them.