I didn't when I was a mod, but I think I would now. Before I felt that it made apping more stressful than it needed to be and my game was really small, so it didn't seem necessary, but now that I'm older and busier, I understand more that it's hard to be the one to reserve first when your schedule is at odds with what's going on in a game's schedule and while it's just a hobby, it is one that many of us derive a lot of joy from.