“Crossing the Rubicon” is a popular idiom meaning to pass a point of no return. It refers to Julius Caesar’s 49 BC crossing of the Rubicon River, to advance on Rome, which was considered an act of war. The phrase has survived to refer to any individual or group committing itself irrevocably to a risky or revolutionary course of action, or position. When your opinion is on the Internet, man it’s out there! There is no takin’ it back.
Coincidentally, I share a birthday with Julius Caesar. — Gary Cornelius