the only reson other sites dont get into trouble is because no one has reported them to the proper copyright holders. IF one fo them were to find your siteat a point whenyou have copyrighted material they can send you a cease and desist and/or seek other legal action, eighty's game or not...(unless you pick somethgng by a company thats gone out of buisness and let the copyright lapse.
Most emu sites ingeneral are just hoing to stay under the radar, so it's probably better for them that forum mods don't allow them to be advertised if you think about it.