Lifting the ground will allow you to debug ground loops. If you lifted the ground using the plug and it fixed the problem, then you now for sure it's a ground loop. Identify the problem first, then try to fix it.
Ok that I agree with; just make sure you find a way to fix it if it IS the ground.
If by any chance in your life,
that device you bought had a failure, maybe a hot wire came loose and touched the metal chassis, an ungrounded chassis would cause high voltage on the metal and you can get shocked.
Ok, I might be a rather unlucky person or something, but at the Ripe Old Age of 20 I have NEVER seen a hot come loose and ground, however I have seen power supplies, outputs, and filters fail which cause a direct connection to ground that if not wired properly could have had the potential to kill or injure someone.
There is no real danger bypassing the ground, just don't make a habit of it.
Totally not true. The ground is a safety fail safe designed for electrical signal path. The ground IS a REAL DANGER and improperly grounded equipment may have a much shorter life.
Certain items I won't bypass ground like any machine what works with water that is plugged in to AC, otherwise audio gear is no big deal really. I've been shocked by 120VAC, no big deal. The bigger demon is 220VAC- 440VAC.
This is one of the dumbest things I have ever heard. VOLTAGE DOES NOT KILL YOU! CURRENT DOES!!! 120 Volts AC has the ability to KILL YOU because of its ability to move current, it is a BIG DEAL!!! It honestly proves you have NO real concept about safety/grounding/or electric in general!
You can also modd existing gear using this trick.
Do not MODD your equipment! Unless you know EXACTLY what you are going to do and don't give a **** about your warranty or the rest of your system!
Electricity is NOT something to take lightly, it is NOT something to play with, and it most defiantly is something you ALWAYS treat with RESPECT!