Is bugging illegal? We are not lawyers and recommend that you seek proper advice on how the law in your locality affects your ability to protect your information.
The Laws concerned with espionage and eavesdropping vary from country to country. What is legal in one country is illegal in another and vice versa. Even within a single country interpretation of the law can vary considerably, as a result,, the legal position in any given situation is frequently unclear.
Regulations are usually straightforward concerning the operation of equipment and the legality of buying, selling and owning eavesdropping devices. But laws concerning gaining access to plant bugs and using any information obtained are frequently more complex.
Perhaps even more importantly, what laws affect any steps you may take to prevent eavesdropping?