I've been thinking about service that injects some lines of javascript for client sites that gives them button "fix this". It would send warning email after few messages about typos but it could also be used to fix these kind of things. Not sure how JS could handle selection and button press simultaneously. Maybe copy+paste part of page with fix. Maybe get some reward for being grammar nazi. Maybe some paid service for auto checking if corrections are accurate and auto-inject corrections to sites.

What the heck, how can I take MS Word online?