Bugging devices are devices for keeping surveillance of a place, such that conversation there can be monitored. People coming in and out can be monitored as well.
| Merits | Demerits |
| Helps to keep security surveillance | Encroaches on people Liberty/rights |
| Helps to prevent robbery and prevents accident | They are expensive to install/make |
| Help Police in solving crimes and in preventing | They are difficult to maintain |
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