As Window Spy is loaded very quick and modification is easy and already shown, both suggestions seem making more sense than my wish.
- Using a hotkey is best workaround, but it causes additionally checking "Follow mouse" everytime WinSpy is started.
(I'm flattered to be addressed personally by the chief developer.)
- It was not unknown for me, that the modification is just a little step for the developers.
I had my eyes on the benefits for the users.
Official modification makes collecting and maintaining needless.
(I like your posts, even if most of them are much too complicated for me.)
I'm not 250% sure, but using left mouse-click more carefully seems best option for now and for me.