Not anything and everything, just the wanton push to encourage others to disregard authority and the law. If you ever wonder why society is breaking down, this is probably one of the contributing factors. There are certain posters who can't help themselves from advising others to break the law and skirt the rules.
Some of the same posters rail away against moto drivers in the DR who don't follow the rules of the road but then turn around and ignore every inconvenient rule they come across themselves. My only real issue is when a poster openly advises someone else that it is ok to break the law. If you wish to risk having your medication seized by CBP that's fine with me. When you advise others to do the same, it moves beyond what I consider to be good form and public conduct.
The OP asked "I was wondering if anyone knows the rules about traveling from DR back to US with medication." I answered them with an authoritative link to the appropriate rules. Right on queue, the antidisestablishmentarianists jump right in saying go ahead, do what you want.
The OP has the information they requested and I hope they use that to make an informed decision for themselves rather than succumb to the temptation of adopting a manner of callous disregard that is so often advocated from behind a cloak of anonymity here on DR1.
I tend to agree with the premise that a rule that is not enforced is not really a rule until it is one time in a thousand. I also tend to think that those advocating anarchy wouldn't be so quick to do so if they risked being identified just like no one is willing to post their info to complain about a company on this site. These posters are just duplicitous hypocrites and I have some faith that those trying to live a ethical life can see these posters for what they are, closet anarchists.