Yea, be careful there, you can add all the grounds you want, AS long as they are tied back to the main ground. You get between the two different grounds, like I said you gotta be careful. They can bite.. A ground is a DRAIN, the difference between the two is YOU.. One hand in the pocket.. LOL
No noise, no problem, you're going to be getting out of trouble, instead of staying out of trouble... If it's not broke don't fix it...
Hospitals do it for bonding because of O2. That stuff will blow up.. They want you to unplug FIRST, then release the bond...or ground. NO SPARK.. ok...
Second if they go into backup, that switching point and grounds EVERYWHERE are an Apollo 11 safeguard... Hindsight is 20/20
O2 and sparks don't mix...
Enjoy Thanksgiving... YUM!
Regards