Considering the sheer volume of threads to cover, the fact that the mods also have real life issues and time constraints, along with the other reasons already given, you probably can't have too many.

Ha! The Backroom is probably the most sedate and well moderated "backroom" I've ever been to.
Which is testament to the individuals who volunteer their time and effort to keep it that way. It's not an easy job at all, and I hope all the members appreciate that.