I’ve managed to ‘brick’ two of my ATTiny2313 chips by getting the fuse settings wrong. I’m not sure what I have done but I suspect I’ve set them to use an external oscillator without one. It should be able to get them working if I add an oscillator to my circuit.
Here is a tool that will help calculate the correct values for l/h/e fues.
It is possible to turn off the reset pin. When this happens the only option is to use the HV programmer. When the device is dead you might be able to recover them with this HV Rescue Arduino shield. I’m not planning to buy as I’d like to be able to use it with ATTiny45 which it does not support.