I guess all of our ships would have negative reputations, since we don't take them off of nice people. I would hope there's some means of "purifying" a bad vessel. They take decades or centuries to build, so just sailing them into the nearest star seems like a waste. Surely the Navy and other such organizations have protocols for redeeming them when they're captured. If we're unable to do it ourselves, maybe we can sell those sorts of ships to the Navy or whoever. In the worst case, we could probably break them down for materials, but that strikes me as a bit of a shame, if there's any way around it.