Social media including Twitter can be considered knowledge commons, as a community of users creates and shares information through them. Although popular, Twitter is not free of problems, especially mis/dis-information that is rampant in social media. A better understanding of how users manage day-to-day issues on social media is needed because it can help identify strategies and tools to tackle the issue. This study investigated the actions and preferences of users who found mis/dis-information problematic on Twitter. Focusing on the action arena of knowledge commons, this study explored what participants did to manage problems, what they thought others should do, and what groups they thought should take responsibility. Four hundred responses were collected through an online survey. The top actions taken by participants were unfollowing, fact-checking, and muting. The participants wanted Twitter, Inc. to ban problematic users and to provide better tools to help filter and report issues. They viewed Twitter and individual users, especially influencers, as the groups most responsible for managing Twitter problems. Differences in actions and preferences by gender and frequency of Twitter use were found. Implications for policies, system design, and research were discussed.