1. Accountability: Requiring real names would make it easier to hold users accountable for their posts. This could help to deter cyberbullying, hate speech, and other harmful content.

2. Trust: Using real names could build trust among users by making it clear who they are interacting with. This could increase engagement and lead to a more positive user experience.

3. Transparency: Requiring real names would make it easier for users to find out more information about the people they are interacting with. This could help to prevent fraud and other deceptive practices.

Arguments against:

1. Privacy: Some users may be concerned about their privacy and may not want to use their real names on social media. This could lead to people self-censoring their posts or avoiding social media altogether.

2. Free speech: Requiring real names could stifle free speech by making it more difficult for people to express dissenting opinions. This could chill debate and make it more difficult for people to share important information.

3. Cost: Implementing a real-name policy could be costly and difficult to enforce. This could be a challenge for social media companies, especially smaller ones.

Conclusion:

Ultimately, the decision of whether or not to require real names on social media is a complex one that involves weighing the benefits of accountability, trust, and transparency against the concerns about privacy, free speech, and cost. In any case, it's a choice that companies like Twitter and Facebook must consider with due diligence and in the best interests of their users.