let me provide a good and nice reply on it
you are right about what you say
but you are wrong to
TQ released his databases and message servers and other emulators for TESTING purpose ( also called alpha or beta releases)
and that makes it go back to the legal part
they can not complain or sue you if you use a beta program for what it is made for and specaily not if it is public released by there own
then a note about emulators , emulators are mostly made by reverse engeneering and there is no law that says that emulators are illigal (not yet atleast)
and to answer your last question
TQ = NetDragon
so emails will come from NetDragon (or a serperaded email adress like vbullet does) or it will complain a VALID DMCA complain (

) and you will realy notice it if it from TQ
as the first rule of a DMCA complain or ANY KIND of abuse complain is that they need to say who they are and under what name they are working
in this case you will alwasy see TQ and Netdragon in the same email (also the game names they are complaining about and a few other things related to them )
so to answer your final question
you will not be able to get a sinlge copyright on a emulator
as that copyright and emulator just does not fit with each other
but you can get a copyright on your OWN work or if you can claim it as your own work (as no1 else claimed it)
but i wish you good luck with that part
Greets From PowerChaos