If your online voice and your real voice sound like two different people, eventually someone meets the wrong one.

Two voices are manageable until the people who know one meet the version they do not. What lives online has a long life and no context attached, so the louder or harsher self keeps existing long after the mood that made it passed. The gap is rarely a lie exactly; it is a persona that picked up its own momentum. Eventually someone decides which one is really you.

Read back a week of what you posted as if a person who likes you were reading it. Mark anything you would not say in a room. Closing the gap is easier than managing two reputations.