Not only is “common” unfortunately not a quantitative assertion (and I disagree), many incorrect usages are “common.”
https://en.m.wikipedia.org/wiki/Head_shake
As earlier stated, obviously some people might use the opposite words for a particular effect.
It’s just not the accepted and used English for those actions. If it was something like “rotated” then it would be ambiguous and subject to interpretation, but the word “shook” already has a meaning
And their point is that they are wrong to do so.
If only there was a way to get to the root of the problem.
I’m pretty sure I only said it was wrong.