Respectfully disagree.
Its also not acceptable to downvote because you disagree.
Not really. There isn't a specific guideline on what downvoting means or what is acceptable to downvote.
Some people downvote comments they disagree with, some do it for comments that don't add anything meaningful to the dicussion, etc.
I think a woldview that quickly realises the ridiculouslness of the premise is better grounded in reality than one that seriously considers it.
> Its also not acceptable to downvote because you disagree.
That's on Reddit. Downvotes on HN have always been used to express disagreement.