To be fair rearbear cables just short out pins 1,3,7 and maybe 9. It has it's own risks if you use it on newer models. If they buy their own cables online and play with the wires they can't do much worse.
I trust that if a new alfaowner is even slightly dedicated, he/she will do research and find the appropriate solution or just visit an independent garage.
Every thread can't repeat the basic info... ex: if we talk about "fiatecuscan" the newbie should have the decency to google or search it in the forums. If they fail in spite of all info in this forum, they can only blame themselves.