"Plaintiffs should be able to sue harassers under pseudonyms to protect their identities"
Most pointless thing ever. Unless you're going to sue them on live television, there's noone to protect your "identities" (might i take a moment to say, wtf? You are one person. Not several.) from.
Who, the judge? Judges don't give away that kind of information to people. The defendant? The defendant is going to instantly know who sued them, pointless. The jury? Pointless again, they're just random people. Plus, I'm pretty sure that somewhere along the line you need to sign your actual name for legal documents.