This thread isn't about horse archers or xbows only - as some mentioned there are melee players and foot ranged that do this as well. Atas does this every single round and it drives me mad. First he avoids any type of combat where he can get killed, then he rides to the edge of map waits until he's the last one alive and starts dueling annoyed opponents with an unbreakable shield while 80 people sit and wait for him to die. Oh the joy I feel any time he gets ganked early in the round.
Imo one should be going for the flag after it spawns. If you're a HA, you can just go and pew pew the guys on the flag and that's fine. A bit boring, but you're still trying to win. However if you just go around the map farming valör off enemy cavalry, it's really lame. Getting valour as a HA is already way too easy. Melee cavalry should either dismount or charge. Standing and watching the flag go up shouldn't be allowed imo. All this should be fairly easy to admin if there's a clear rule.
Personally I don't care about my KDs that much and as an horse archer I will most of the time dismount and fight with my 0PS/0wpf/0ath build and a club. I'd do it more often if people didn't gank me immediately when I try to do that