For an individual it's not a big deal (yes it's illegal, but no one will do anything to you) unless you are a distributor. If you share the rom, someone might come a knocking (and be able to sue you).. but the chances of that are so slim that no one cares.
But rules are rules. Forum rules state that you cannot ask where to get a rom or talk about where to get one in any way, shape, or form.