If they get it at aduanas and its not legal to get trough they will simply throw it away no? Can they really go after X person if it's not legal?
We all hope that those with authority over us are able to use some "common sense" at least some of the time. There are those who are stricter in their adherence and interpretation of their job than others. Small quantities of stuff that pose a problem are probably disposed of. You might get an explanation for why. A case of something might be seen as an attempt to setup an income stream and could be a bigger problem.
There are never any guarantees when operating in gray areas. If you take the risk by ordering it, you accept the risk that you may not get it. If you do great. The next order, same deal. I guess order it until the day comes that delivery is blocked. Choosing to poke the bear a second time after that is up to you.
Ask your courier company. They are the ones that don't want the DEA pounding on their door in Miami and should know if there will be an issue in the DR.