Excuses and more excuses. There is no reason for not asking to use the restroom at a public establishment such as McDonald's, a shopping center, supermarket, etc. If one must use the bathroom in public (outside), there is no reason to not exercise some decency and be discreet as possible, as opposed to just doing one's needs, specifically defecating, just anywhere, in front of anyone, as Haitians routinely do in the DR. The amount of Haitian apologism here is incredibly disingenous. My family comes from humble beginnings in the DR, where for many years they had to live in barrios where all the neighbors had to share bathrooms and letrines out in backyards and not once did you hear or come across ppl defecating in public. Even in the countryside if you couldn't make it to the letrine, you would at least go behind some bushes, trees, whatever, but there was always an exercise in some form of discretion and personal hygiene.
There is no justification for not exercising discretion and hygiene with ones necessities unless you are mentally or physically impaired in any way.
i am with you when it comes to your revulsion at the idea of people expediting their bodily functions in public, in full view of disgusted onlookers, and with no regard for hygiene consequences. however, please pay a little more attention to the realities of life in the DR for Hiatians. i do not really believe that McDonalds is going to tolerate an unending parade of Haitians wanting to avail themselves of the sanitary facilities. it will be a very short period of time before a notification is made that bathrooms are for customers only.