We have a lot of identification questions now, and I wonder: would it would be useful to retag these with the identified plant/pest/disease when this has been determined?
For example, this question about identifying a vine might be retagged morning-glory if the first (and currently only) answer turns out to be correct.
My thinking is that, if you've got some idea of what your plant/pest/disease might be and you're googling for help in making a positive identification, you might find one of these questions and have it answer your question.
(The same line of thinking goes for diagnosis questions too.)