Does anyone use wood for vibration control?

Sound is nothing but vibration within the bandwidth of the ear. So, you want materials that don't resonate at those frequencies.  

Hell the Earth is constantly vibrating and ringing from earthquakes etc. It’s a matter of degrees really. It seems all of audio is managing vibrations.

Mapleshade’s footers are not cone shaped because cone tips can resonate at the wrong frequencies. They are cylinder shaped with a shallow point instead.
You will get lots of opinions on this as with most topics. This comes down to tweeks really. In the grand scheme of audio things it is better to get the bigger issues of equipment synergy and the room/speaker setup dialed in before worrying to much about fine tuning with racks and cone and such. The exception being for turntables. Very important to have a good support under a TT.

If woods didn’t resonate they wouldn’t make such good resonators, you know, like the Mpingo disc.

She wouldn't need the vibration if she had the wood.

Couldn't resist could ya?