Can anyone think of a "writing mistakes" version of this blog? Making public another's writing may be too far.... But it would be interesting to mine the data

Can anyone think of a "writing mistakes" version of this blog? Making public another's writing may be too far.... But it would be interesting to mine the data and classify non-grammatical writing mistakes, specifically to ease the stress of grading college junior research papers -- some of which are written at a middle-school writing level -- by parsing sentences and auto-applying applicable writing mistake classification, to which I can gently glide my eyes to and convert to something intelligible.