It's common to regret things we say from time to time, but making a mistake in a conversation or sending an embarrassing message in a group chat is nothing compared to the potential horror of posting something on the internet that you deeply regret later. Justine Sacco's infamous tweet is a reminder that deleting a cringeworthy post may not be enough, as it could already be too late. It's important to remember that anything you say or post on social media, including revealing photos or comments…