I heard the most unusual thing. A 3.5 woman and her 2.5 male partner are going to nationals in 6.0 mixed. He is self-rated. In addition to 6.0 mixed, he played 3.0 men's. He won one doubles match and lost a singles match at 3.0. I don't know him and don't know how he plays, although his female mixed partner told me she thinks he truly is a 2.5. Anyway, it occurred to me that there would be a very easy way to sandbag in mixed, if one were so inclined. Step One: Self-rate too low. Step Two: Join an adult team and play one match, which might or might not generate a strike. Step Three: Play mixed and dominate. If one's mixed results don't count if the player also plays adult league, isn't this something of a loophole? Is that how mixed DQ works?