A. 1. Check user settings: Look for any options in the app that allow you to manage users or block them. 2. Report users: If blocking is not available, consider reporting users who are causing issues, which may lead to action from the app's moderation team. 3. Mute users: If possible, mute users who are disruptive instead of blocking them.

B. 4. Leave the chat room: If a user is causing problems, consider leaving the chat room and finding another one.