Re: Unleash a "flood of vulgarity"?
All it does is let you trademark something like "New York Fucking City"
You already can, and always could, trademark "New York Fucking City" (unless someone else has it that is).
This decision just means that you can register the trademark with the USPTO. The USPTO is not an arbiter of what is and is not a trademark, it is only a registration body, and its powers are limited to registering or not registering a mark. And registration, or lack of, is not a determiner of whether a trademark is in fact a trademark or not, it merely grants extra benefits, which are usually only applicable in a court setting when sueballs are being flung around over a trademark.
All it takes to make a trademark is for you to declare you have a mark "<insert desired mark>". It is up to the courts to decide, via a challenge to the mark by someone else, whether the mark is valid or not. In this respect, the USPTO is not a source of truth, it is a source of expert testimony if you will. A court can overturn a registered mark as easily as an unregistered mark, or, as in this case, can affirm a registered mark as easily as affirm an unregistered one.