A computer system performs actions in response to receipt of message notifications. The actions may include preventing the message notifications from being manifested (e.g., displayed on a screen). The actions may be specified by profiles. The computer system may activate and deactivate profiles. For example, activating a first profile may cause a second profile to be deactivated. When a message notification is received, the computer system may perform an action specified by an active profile but not perform an action specified by an inactive profile.