I'll save myself the argument about the legality of Roms, and assure you that they are against the rules here.
Quote:
Links to sites with illegal content, or content not suitable for all ages (this includes ROMs & Emulation sites, sites that contain sexually explict material etc.) is stricly prohibited, and can be punished with a ban without any warning.
I thought that it was legal, only if you kept it for a while. There are types of roms though if you have it for to long the game will screw up and not work anymore.