The only solution I could think of would be for confirmed cases of online harassment (however you determine something to be confirmed, I don't know) to be sent

The only solution I could think of would be for confirmed cases of online harassment (however you determine something to be confirmed, I don't know) to be sent to the offender's employer, or for something along those lines be a part of background checks/E-Verify. You're right, it does seem like the status quo heavily favors abusers and maligns the abused. I'm sure there are several flaws with my idea. I just can't think of much else that could change anything without being extraordinarily invasive or punitive.