5. Putting "." before finishing quote. Like this: "fucking shit." Should be: "fucking shit". It is an archaism and Americanism and the reason it exists is not

5. Putting "." before finishing quote. Like this: "fucking shit." Should be: "fucking shit". It is an archaism and Americanism and the reason it exists is nothing but technical limitations of printing presses. It screws up with language's goal -- to transfer information effectively. To reach that goal, we must break any rules and evolve our language instead of religiously following whatever we were taught.