Its difficult to quantify the precise level of threat, however information gleaned from various sweep teams indicates around 45% of bugging incidents are internal.
Directors bugging other directors, bosses bugging employees, spy cameras, phone taps and listening devices etc.
Definitions are tricky, if an employer states in a contract of employment that telephones may be recorded, is that telephone tapping? Probably not.
When business expansion or rationalisation plans are being discussed. New products or marketing initiatives are being developed. Acquisition or mergers are being planned, or perhaps work is in a sensitive related industry. Of course, this also applies to legal and financial advisors party to the same information, if senior executives or customers are subject to media attention.
The generally accepted business practice is quarterly, although some of our clients have requirements for monthly inspections.