History is also full of disasters due to people over-estimating their enemies...a mistake as fatal or more so than under-estimating them.
But the kid who got banned wasn't doing either over or under estimating...he was spreading erroneous information such as Tritium being an atomic trigger, gun assemblies not needing triggers, etc.
You said -- "History is also full of disasters due to people over-estimating their enemies...a mistake as fatal or more so than under-estimating them."
This is *one specific area* where I would prefer to overestimate them -- when it come to my borders in my country and my city in which I live. I'll take overestimation -- thank you...
Regards,
Star Traveler