How the heck are hijacks legal!!!?

Does anyone know of a way to obtain a list of all of a companys' email addresses if I already know the domain name and the general company info???

I am trying to get all of the emails that belong to gammacash if you don't already know them they are the ones who claim title to the Istbar hijack.

And while im on the subject I can't find any information on who the xrenoder hijack belongs to. Any help would be greatly appreciated!!!

I want to make sure that everyone who works/afdfiliated with this company hears about my conversation 2 nights ago w/my 8 y/o daughter....!