A system and method is provided for event data collection and processing in a multimedia network. The server can include an event collection manager that receives messages containing event data from plural settop devices. Upon message receipt, the event collection manager accesses a database to identify a data aggregation group for the set top that sent the message and anonymously stores the event data in association with the data aggregation group. The data aggregation group can be associated with a policy that specifies anonymous storage of event data based on event type. For example, the data aggregation policy may specify storage of individual event types with personal identification information. Conversely, the aggregation policy may specify anonymous storage of individual event types anonymously excluding personal identification information. Aggregate reports can be generated from the stored event data by aggregation group.