1. A system to facilitate information access control, comprising: memory; and one or more processors coupled to the memory and configured to: receive an access request for a data item owned by a data item owner, the access request being based on a request from a requesting user, determine whether the requesting user is a member of a dynamically created group of users based on an activity of the requesting user, dynamically select an access policy based on the dynamically created group of users to which the requesting user is determined to belong, and selectively provide access to the data item to the requesting user based on the access policy and further based on an urgency of the data item.