The immunity has never covered federal criminal law, intellectual property claims, or, since 2018, conduct related to sex trafficking. Defenders argue the most serious harms already have legal routes, and that the remaining gap is mostly civil claims over speech that is offensive but lawful. Advocates for change respond that the 2018 carve-out is itself evidence the shield can be narrowed without collapse, though researchers disagree about whether that change helped victims or pushed activity to less visible platforms. That disagreement is the closest thing to a natural experiment either side has.