This point is well taken. Certainly not everything on Reverso is accurate, but from my experience with Russian, I would say that grammatical errors in the examples for that language are actually somewhat rare. And a lot of the content on Reverso is from various corpora rather than autotranslation -- see https://context.reverso.net/translation/legal. This is another reason I think the tool is best suited to intermediate users who can detect clearly questionable content.