1-RP-wise (and here I talk for myself, not in the name of any house), as it happens in real life, main-houses should not accept negotiations with unlawfuls, even when there are hostages involved. Think about it. The moment it is done once, every single unlawful will start kidnapping people to ask for ransom
2-I remember once some unlawfuls that started this way to lure some lawful players to a well prepared trap full of Missile boats. Some call that RP....
So personally, myself I will never agree to such exchange. If some superior decides to do the exchange, as always I will follow superior orders.
