The people that are working on the project haven't implemented namespaces, or any other security feature really, so what they say is immaterial. What they do is the only thing that matters.
The point is that it's much easier to make a mistake typing "requests" than "
org.kennethreitz:requests" (as a pure hypothetical.)
It also means that more than one project can have a module called "utils" or "common", which once again reduces the risk of people accidentally downloading the wrong thing.
