This is from emupedia with some words changed,ect.
Many people are saying that WoW Emulators is illegal. This statement is WRONG.
WoW Emulators, on it's own is not illegal, the developers provide the software, and it is up to the end user about how they go about deploying it.
When WoW Emu's are used alongside with Blizzard files, namely from the World of Warcraft client, it becomes ILLEGAL, on YOUR behalf - not the emulator developers.
Such files are, DBCs, maps and a database.
The emulator's team supply a blank database, which is not illegal because it contains no Blizzard copyrighted information.
So to all you public server owners, before you dare go bashing WoW emulators for being illegal anyway, I implore that you all read this post before making such a stupid claim.
Credits -
compboy - Emupedia Moderation Team & On behalf of the Ascent developers.