Many people opt to first try a decoy (fake) wireless or wired security camera.
The decoy security camera looks very real and accurate. It does not however actually take any real video or imaging, so if something does happen there is no proof.
There are many forms of the decoy security camera. You can purchase fake dome security cameras, fake motorized security cameras fake wireless, etc. Many even come equipped with the red flashing lights, and will move left and right to give the impression it is a real security camera.
Decoy security cameras may be able help to prevent a crime at your home or office. Most would be thieves or criminals will not want to take the risk that indeed these cameras are just decoys.

A lot of the time companies will use both decoy security cameras and non decoy security cameras. This way their employees, possible thieves, etc will not know which a fake is and which is real.
In conclusion it is fair to say that considering these decoy/dummy security cameras do not cost that much, they are a good first step in ensuring security. Although there are no guarantees this will deter illegal activities it’s a good start.