...About those "imaginary" compressor explosions....

On code built vessels the weld seams are stress relieved. Then legs are welded on and motor mounts are welded on. Chances are these welds were not stress relieved. So there would be locked up stress in these areas. These stresses can result in cracking due to vibration. The vibrations of running your compressor after completely draining your tank daily may increase the stress level.
If you drain the water out of the tank in the morning and after work there is no need to total drain your tank completely. The other alternative is install a automatic drain. Be proactive inspect the compressor mounts and leg welds for cracking. If your compressor and tank is bolt to the floor place a shock absorbing material between the leg and the floor. If the tank is not a code built air tank then be extra cautious. When not attended shut the compressor off.