You know that even if you delete that ill-advised tweet right away, once posted online it’s there forever, right? No, really – it is. And the Library of Congress has it; they have EVERY public tweet sent since 2006.
But don’t worry, no one will be able to take advantage of your social missteps just yet – the database is not searchable. So the likelihood that a researcher will find (and use) your tweets to illustrate humanity’s depravity has been postponed – for now.