PetManimal writes "Computerworld has an article about IT staff who have access to corner-office email. Systems administrators, database administrators, storage administrators and higher level IT super users are the types who may access sensitive executive information; one source quoted in the article says that in a company with 1,500 employees, there might typically be five to 10 administrators who have this access. As for how many abuse these priviledges, it's hard to tell, but rogue admins out for workplace revenge or personal gain can wreak havoc: '... Experts agree that the severity of these occurrences generally makes them more harmful than external attacks. One of the biggest obstacles to eliminating unauthorized access is determining how many people have it. Access lists are particularly difficult to formulate in both mature companies, where the number and power of administrators have expanded over periods of years, and small companies, where rapid growth leads to undocumented tangles of administrators who are able to maintain their access because nobody has time to assess their status.'"