All the deserter debuffs do to deserters anyway is it makes them hide in the corner not doing anything when the match goes badly and afk rather than leave outright. (happend in AoC once the deserter debuff was in place)
Deserters are not people who are in it for scraps of internet honor or the respect of some elitest pvpers, they are there for fun and when they stop having fun they leave, which happens around the time when they realize they will lose.