Rules of thumb by definition don't 'scale' (is this the right word?): they're true on the whole most of the time.
The point of 'assume good faith' is that it's very easy to convince yourself that semi-anonymous people on the internet are liars. Most of the time they're not. It's very easy to inadvertently make factual errors. Published books that have been carefully reviewed are full of them. What chance do random morons ranting on the internet stand?
The point of 'assume good faith' is that it's very easy to convince yourself that semi-anonymous people on the internet are liars. Most of the time they're not. It's very easy to inadvertently make factual errors. Published books that have been carefully reviewed are full of them. What chance do random morons ranting on the internet stand?