Hi Robsker,
There have been a number of debates here about using cheater plugs as permanent solutions to hum problems, such as in
this thread. As might be expected, opinions are divided. Some people do just that, while others argue fervently that it is a serious safety risk.
I believe that the following comment I made in that thread is indisputable, assuming that the equipment is in good physical condition:
If a fault were to develop in [a component] that shorted the AC line voltage to the [component's] chassis, there are various scenarios in which that could result in both a shock hazard and a fire hazard. How great are those risks? Very, very small. But it cannot be said that they are zero.
Regards,
-- Al