Nefario apparently actually scammed people, is terrified of prosecution, and has crawled under a rock.  What you seem to be asking for here is the right to give your tax ID number and other identifying personal information to Nefario rather than Giga. 

Firstly, given Nefario's current attitude, it is extremely unlikely that anyone could convince him to re-open the GLBSE dividend system and open a repository of users' tax and ID information.  So someone would have to take protracted, expensive, uncertain legal action to try to force Nefario to do this, and in the meantime you would not get your dividends.

Secondly, from a personal security perspective, I find it hard to believe that there is anyone out there who would rather entrust their sensitive details to Nefario rather than to Giga's law firm.