You know who loses when a "real" names policy is enforced? Native Americans, domestic abuse survivors, anyone who wants to express a political opinion without risking their job (or in some countries, their life), people asking intimate questions about sex, and many more.
You know who wins? Data brokers who want to buy your data from Facebook.
Provide me with evidence that using a "fake" name makes you more likely to cause abuse, and I'll eat these words.