I also always keep my instruments out of their cases - I know what you mean - they are there, and are begging to be played....
As regards the "wall" issue - yeah - I had a couple of wall-hangers for 2 of my fiddles (one has a floor stand, little brother of the cello stands you have there), and a couple of the others take up space on one of our easy-chairs !!!!! Yeah - back to the point - the ones hung on the wall hangers had (at that time) shoulder rests attached. That weight was sufficient to alter the center of gravity and swing the instrument back until the shoulder rests contacted the wall... I eventually noticed slight, but obvious scuff-marks. (Not a problem any longer, as I play without shoulder rests) - but still !
I seriously recommend not copying my mistakes. D'oh -
Please make your own, different mistakes, and help us all learn :-)