Surveillance cameras are easily defeated. Depending on the type of cameras it can be as easy cutting a cord with scissors then stealing the hard drive. If it is cloud based then you just hack into the system and delete the files too. If the camera system is monitoed on a network you just hack into the network then create a loop feedback of old video while the heist takes place. Sure, there are more complex systems out there but they too can be defeated using EMP's or infrared bursts,
