If you just log out while dead, then log back in, you return with the Honorless Target debuff, so they won’t get any honor from you. I do this whenever Horde deathballs camp me, they stop very quickly.

EDIT: Addressing concerns - My personal experience is when I am out farming, say in Silithus, and a group or 4+ horde start setting up camp on top of my corpse, they will leave after noticing I am giving them no reward a couple times. This is in contrast to other times where Horde will cycle through and each person takes turns killing me taking almost an hour for each of them to get all their honor points out of me. I do not expect the worst of the imbalanced servers, on the worst places (such as Thorium Point to BRD) to mitigated to the same degree as the times when only one group has its full attention on you. They are different problems fundamentally.