Actualy I could think of a neat use...
(I have to say I simple writting from scratch and have never installed it, will do it wehn i'm @ home)

...for example to build a "leaderless"-follow like in Focusless, targetless, 'leaderless' setup.
but without the complex setup of keybindings.

Example (3 Toons):

you have ToonA, ToonB, ToonC create the following makros and bind them to your "follow-key":

ToonA-macro:

/w ToonB !voodoo follow ToonA
/w ToonC !voodoo follow ToonA

ToonB-macro:

/w ToonA !voodoo follow ToonB
/w ToonC !voodoo follow ToonB

ToonC-macro:

/w ToonA !voodoo follow ToonC
/w ToonB !voodoo follow ToonC

so all toons will follow the Toon with the active window...
..if voodo would work with focus or target you could use this for simple assisting also

(if it would be fast enough)