i havent really had this problem (i once got grouped with 3! sith sorcs on group finder and simply passed on all the light armor) i will likely pass it unless, say, it is an upgrade leaps and bounds above something on vette, quinn, or jaesa, in which case i simply greed it, because really, i can always search for an upgrade for companion gear on the gtn.
but if you need on something class locked, unless you are that class, i do not think you should get that item.
simply remove the "need" button on items that are class locked unless you are that class.
This is exactly what I mean. Only the items that are locked to a particular class.
Watch how many ninjas start coming out the woodwork now we've got the finder.