I believe this is a good idea, perhaps people are assessing their collection and trying to remember what they have done that works for their particular environment and species.
I don't use chemicals anymore, instead I rely on mechancial or organic controls such as insect soap(Safer's) or a little dish soap in water for a soil drench. You must water your orchids before applying the soap so that it stays in the mix to kill the bugs more effectively. It is also important to make sure the soap isn't too strong or it may stress the plants. I usually allow 10 to 14 days between applications(mainly during fungus knat season in the late winter/early spring around here). For scale I have applied rubbing alcohal with a Q-tip to remove them, then sprayed the whole plant with bug soap/dish soap or a diluted version of the same alcohol. Repotting or drowning sow bugs are the only effective control I've found yet for these resilient critters! And there's always a few ladybugs and spiders here and there to get the ones I missed.
For fungus problems I have used garden sulphur, bordo powder, cinnimon (for cuts). I have recently used baking soda mixed with dish soap(a rose fungus cure) on leaf spot but I won't know how well this works for some time yet.
It's also important to avoid spraying when the temp. is too high, since this can burn the foilage of your plants. Many controls will also damage flowers.
Good air circulation and proper watering practices are always the best way to prevent fungus and rot. Keeping your plants happy is the best way to avoid bugs since they are natures control for the diseased and weak.
Wow, I think this is the longest post I've ever made!