A flight data monitoring program is in effect in most airlines, all data from the FDRs is downloaded and analysed. This is used to identify trends and devise an appropriate response, eg focusing on specific areas in recurrent training or putting restrictions in place. This is anonymous however certain events will automatically flag up, such as a GPWS warning, unstabilised approach, overweight landing, speed exceedence etc. Raise a flag and you will be identified resulting in an invitation for tea and biscuits, some events are mandatory reports to the authority which are far more serious.