By the nature of the device the meshes need to be fairly exposed. They can be enameled so as not to shock you, but only barely. Any scratch, rubbing, or other wear can expose bare metal at >1 kV. That is a major fire risk; any spark is presumed deadly in electrical engineering. Dust accumulates everywhere, and you'd be amazed how much people mistreat electronics. Leaves, dirty laundry and dust may as well be tinder.
The even bigger concern is mostly that a moderately loud speaker system (>50-150 watts) can electrocute you. I mean that literally, as the portmanteau of electricity and execution. 1 kV is easily enough to put electricity through your heart; 50 milliamps would be lethal. 50 mA at 1 kV is only 50 watts, less than a laptop charger. A big set of electrostatic speakers can just stop your heart if you're very unlucky.
The even bigger concern is mostly that a moderately loud speaker system (>50-150 watts) can electrocute you. I mean that literally, as the portmanteau of electricity and execution. 1 kV is easily enough to put electricity through your heart; 50 milliamps would be lethal. 50 mA at 1 kV is only 50 watts, less than a laptop charger. A big set of electrostatic speakers can just stop your heart if you're very unlucky.