Should we disagree if the picture is too blurry?

no you should not disagree, unless you are an expert on the species and are highly confident it’s impossible to get an ID from the photo. An intermediate if you are confident in that the ID seems reasonable is check ‘no’ for ‘can the ID be improved’
See also:
https://forum.inaturalist.org/t/records-on-inat-that-are-of-no-value/4062/5

2 Likes