Twitter accounts are public by default, but Twitter gives the option to create protected accounts, where only approved followers can see their tweets. The publicly visible information changes based on the account type and the visibility of tweets also depends solely on the poster's account type which can cause unintended disclosures especially when users interact. We surveyed 336 Twitter users to understand users' awareness of account information visibility, as well as the tweet visibility when users interact. We find that our participants are aware of the visibility of their profile information and individual tweets. However, the visibility of followed topics, lists, and interactions with protected accounts is confusing. Only 31% of the participants were aware that a reply by a public account to a protected account's tweet would be publicly visible. Surprisingly, having a protected account does not result in a better understanding of the account information or tweet visibility.

翻译：Twitter账户默认为公开账户,但Twitter提供创建保护账户的选择,只有经批准的追随者才能看到他们的推特。基于账户类型和推特可见度的公开可见信息变化也完全取决于海报的账户类型,这可能导致意外披露,特别是在用户互动时。我们调查了336个Twitter用户,以了解用户对账户信息的可见度的认识,以及用户互动时的推特可见度。我们发现,我们的参与者了解他们的概况信息和个人推特的可见度。然而,所关注的专题、名单和与受保护账户的互动的可见度令人困惑。只有31%的参与者知道,公共账户对受保护账户的推特的回复将公开可见。令人惊讶的是,有保护账户的账户不会导致更好地了解账户信息或推特可见度。