This issue does not seem to be as black and white as you say. that is why I am buying a microscope so I can check the results for myself, and post them for all to see. I see these lump statements being made by people all over the place. However almost all of these people do not own a microscope, and are repeating things second hand.
Remeber playing the telephone game when you were a kid?
It starts out with purple car, and ends with neo-nazi skin head, gang bangers bustin' caps in the barrio, while listening to Celine Dion.
I believe there to be a happy place where the leachate, and the ACT can come together, and live in harmony. The only way to find this place is through a microscope.
I could be very wrong. regardless of the results it will be a very educational process.
I knew this thread was going to be a good one.
For the record, I wish to state that the 'story' about guanos inhibiting microbial growth/division did not come from me. What I did state is that quanos are usually not composted and therefore including them is like making a manure/compost tea.
I have never tested quanos mostly because I've never seen the sense in spending money on the product. I have no doubt that looking down the microscope tube we will see bacterial/archaeal life (& probably fungi) and division using guanos or horse or cow manure or diesel. This is not the point.
The point is to grow out/multiply a microbial nutrient cycling consortium. Ideally one is looking for the 'set' of microorganisms existent in compost, soil or vermicompost. Adding ingredients with the thought that the ingredients will promote plant growth is likely counter-productive, as that ingredient will likely serve to feed or stifle microbial development.
If it stifles the microbes, then positive results observed will likely be from that ingredient alone. In that case one would be better off just using that ingredient and skip the tea making process.
One such ingredient [in my observations so far] is humic acid. Also please be aware that adding anything to a finished ACT is usually counter-productive (except 'maybe' in miniscule amounts)
I do know some people who have used leachate in ACT with no negative results. No big boogy-man comes out if there are some anaerobes in the mix. This can be a good thing in the long run.
I believe that it is very difficult to make compost tea which will harm your plants/soil so long as it really is compost tea and has not been brewing long enough to develop pathogens (eg. fusarium). It is however, possible to harm plants by overdosing ingredients.
I have stated all of this previously in this forum.