There are a few risks associated with using ceiling vibrators.
First, if the room is too small, the vibrations could be amplified and become overwhelming.
Second, if you have hardwood floors, carpets, or tiles, the vibrations may cause them to crack or break. Third, if you have sensitive hearing, the vibrations from the ceiling vibrator could cause you discomfort.
Fourth, if the device is not properly secured to the ceiling, it could fall and cause injury.
Finally, some building codes do not allow the use of ceiling vibrators. Be sure to check with your local code enforcement office before using one.