Alton Lannister appears in season 2 of Game of Thrones. He's sent by the Starks to King's Landing to bring Robb Stark's peace terms.
My question is: why did they send a Lannister, a member of their own family, back to the Starks, so that he could be their hostage? Wouldn't it be better to sent just a less important common sellsword or seriously anyone else but Alton?
This decision costs the Lannisters a life, cause Alton is later killed by Jaime, who wants to escape from the camp. If they sent another person, Alton Lannister would be alive and well.