Require Statement of Ethics from Academics
Academic researchers should have to submit a statement of ethics declaring their work with Twitter data will not be harmful to oppressed and marginalized people, who are disproportionately harmed by unethical data research practices. Twitter should also make the statements available to the wider community so other folks can learn from them or get ideas for modeling their own statements.
Matti Nelimarkka commented
Note that research ethics is highly depending on the community and country researchers are located in. For example, in my institution, most Twitter-based studies are exempt from IRB review. So implementing this requires careful consideration.