In the category of "general" today we have twenty examples of "bad opinions" from the "bad opinion generator" at "The Week."  No argument on their badness.  Only I question whether they're "opinions" or not.  Some, nay most, of them are horrible predictions:

"Albert Einstein (the little boy) will never amount to anything." 

Others are just likely false propositions:

"This virus [AIDS] is a pussycat."  

So maybe it would be helpful to sort these into categories: wrong predictions, wrong evaluations, false propositions, etc.  Categories make lives easier.