Before you answer, consider this: the person signal-boosting you has much wider reach than you do. There are now tens of thousands of people in the world who know you only as the guy who said that one embarassing thing one time. For that matter, anyone who Googles you will know you only as the guy who said that one embarassing thing one time. All of your triumphs, all of your defeats, all your loves and fears and follies – none of these exist in the public mind. If you cross a blogger, a columnist, or a Twitter celebrity, all that will exist is that you once retweeted a racist joke on the 26th of March, 2014.
Never retweeted a racist joke? Someone will find something. Maybe you’ve been a sex worker once – hope you didn’t put your picture up on the Internet, or else Reason columnists will say it’s not “doxxing” to merely “signal-boost” it so that everyone knows. Heck, even watching porn is enough to get people fired some places. Maybe you were stupid enough to admit you were gay or trans under something traceable to your real identity. Maybe you voted for Trump (a firing offense in some places) or against Trump (a firing offense in others). Maybe you committed a crime someone can find on a public crime database, or maybe you said something perfectly innocent which can be twisted into a sinister “dog whistle” out of context.