The thing is that most aviation discussion in the Aust / NZ region doesn't fit neatly into one area (Flying Instruction, GA, Airlines or whatever) - the dynamics and interactions are such that a topic of interest often crosses over these arbitrary boundaries and generates relevant opinion and comment from many sectors of the industry.
If healthy and well-rounded discussion of an issue is what you want, then trying to pigeon-hole it isn't the answer.
Yes, strong action from the moderators is necessary and welcomed by most when slagging matches start, but don't kill the essence of the site by getting too heavy-handed and prescriptive, please.