Anyone who says racial profiling is illegal in the US is a dreamer - what about the "welcoming committee" of 4 or 5 ICE agents immediately outside the jetway, greeting everyone debarking all flights from the DR to the Miami airport, and grilling them, and then pulling aside any solo dominicana-looking females who look under 30 years old aside for "secondary screening" BEFORE they get to Immigration there? When they ask me what I was doing in the DR, I always respond "I LIVE THERE", and they let me go right away.
Same at US Immigration - when they go through my passport and look at all of the DR stamps, and comment "you sure go to the DR a lot", I respond either "I live there" or, "nobody has outlawed travel YET", and they get rid of me quickly.
As far as carrying a lot of Dominican coffee back in your luggage, be aware that coffee is a drug smugglers tool to mask the scent of drugs in luggage, thinking it will throw off the dogs in inspection. If i carry coffee, I try to limit it to 2 or 3 bags, and always in my carry-on bag rather than my checked bags. At least then, I can watch them go through my stuff, instead of behind the scenes, where they might decide to filch something else, after not finding drugs.