"Cloning" may not be cool, but it remains to be seen whether or not the specific example of The Sims Social and The Ville constitutes illegality as opposed to simply bad form. Given a timeline of sufficient length, eventually the increasingly brazen/desperate Zynga was always going to pick the wrong pocket.
If nothing else, it's an opportunity to revisit Sirlin's The Aesthetics Of Cloning.
(CW)TB out.