Reason #43 - Anyone can build or buy a bug with the help of the Internet.
Here are a few examples...
--- Free advice ---
Record Telephone Conversations By Building This "Bugging" Equipment - by Swagatam
Introduction
At times many of you must have felt the need of spying on somebody’s conversation over the telephone and wondered how to bug a telephone.
Morally it won’t be correct to eavesdrop on an individual’s personal discussion, but through electronics you can always and every time find a way of fulfilling your wishes no matter whether the act is ethical or not.
Though I won’t recommend using the present circuit for listening to somebody’s private talks, it can rather be used as a fun gadget for broadcasting a telephone conversation over the FM radio." (more)
--- Books ---
Now Hear This
--- Low cost devices for sale ---
eBay
--- Antidote ---
Business Counterespionage Strategy.