@howdy1 - It's very easy for a regulator to detect an irregularity in the number of vote cast.  Simply a matter of comparing that number to the float.  The study hypothesizes that FTD's create voting shares that can influence an outcome, but it's really moot if the naked shorts don't exceed the float - less the number of shares held in cash accounts.  Anything up to that quantity can be covered by the brokers and is no different than a physical delivery.  

As for the short position of UUU, it's only 2+ % and nowhere near the type of situation put forward in the study.  It's possible that UUU's short position has grown (and that's not completely confirmed) because more people believe the take-over will fall through and UUU's share price will retreat.