[Derision]

My alternative approach (wiping the client's hatelist on FD), which also seems to work is:

Index: client.cpp
===================================================================
--- client.cpp  (revision 34)
+++ client.cpp  (working copy)
@@ -1921,6 +1921,7 @@
                        SetPet(0);
                }
                SetHorseId(0);
+               WhipeHateList();
                entity_list.ClearFeignAggro(this);
                forget_timer.Start(FeignMemoryDuration);
        } else {