Doesn't matter. Sometimes I salute, if I think it was an especially good fight or I feel like it. Sometimes I don't because I am simply not thinking about it, or on to something else and didn't even bother paying attention to who it was that killed me. The bottom line is I don't expect a salute if I shoot someone down. Those are expectations that will never be met so I would constantly be disappointrf. I'd rather have no expectations and be pleasantly surprised if it happens than have an unmet expectation and spend most of my time disappointed.