1. A method for generating an auto-adaptive baseline model to profile behavior, applicable to monitoring activities of a plurality of members in a network data environment, said method comprising the steps of: creating a model; defining a plurality of members and a plurality of collective behavior variables, each said member has a plurality of individual behavior variables, said collective behavior variables and said members constituting said model; defining conditions for each said individual behavior variable and said collective behavior variable; monitoring member activity and, upon detecting an activity by a member, updating corresponding individual behavior variables and collective behavior variables; comparing said updated individual behavior variables and said collective behavior variables against associated conditions; if any said condition being met, issuing an alert event to notify designated personnel; and upon receiving an alert event, said designated personnel able to decide whether to manually redefine said associated conditions or to ignore said alert event; if to ignore said alert event, said conditions being automatically redefined.