I suppose that this could have some adverse consequences of coupling a large surface that could be vibrating to the stand.
I have a very tall rack sitting on a carpeted floor (wooden, suspended floor). On top I have a turntable so I needed the stand to be totally stable. I use angle brackets that attach the top of the stand to the nearby wall. I have not had any problems with this setup.
I have a very tall rack sitting on a carpeted floor (wooden, suspended floor). On top I have a turntable so I needed the stand to be totally stable. I use angle brackets that attach the top of the stand to the nearby wall. I have not had any problems with this setup.