What kinds of back links are considered the most powerful?

I agree. The number of posts containing nonsense in this thread far exceeds the three or four that actually make factual statements. Also no sooner has someone made a factual statement about how the prior posts are mistaken than several more posts are added that state the same nonsense as had just been refuted.

Few seem to be actually reading the thread before posting their nonsense.

This is what turned Digital Point into Digital Pointless

Few seem to be actually reading the thread before posting their nonsense.
This is happening more and more on almost all forums (Digital Pointless is the worst for this)