Robfine,
Despite the sonic benefits one may or may not get from placing spikes for speakers, I have never been a big fan for just the reasons you allude to, not including others moving the speakers when they so desire.
Spikes damage just about every single floor you place them on, hardwood, carpeting, tile... they just massacre the floors, unless you place something under the spikes themselves.
I've always thought that there has to be a better audio solution than spikes.
Lo and behold there is, they are called Stillpoints, but at their price point, one has to the gift of gab to explain to your wallet, or anyone else that matters, the justification. Okay, the sound is better.. but still...
..
All that to say... you are definitely NOT alone..