It's quite possible. Aside from one drabble around a month ago, I haven't written/posted anything DGM in a year [approximately], but I used to post a lot of Madarao/Tokusa stuff. It was my primary writing material, and I believe I was one of the few people who actually wrote for it at the time. Mutual acquaintances are also a possibility, however. Are you familiar with Bookkbaby and/or Ainoche/N.H.Arawn? Both of them were pretty well-known back in the day, and are good friends of mine.