> Websites modify user content all the time. Not manually though. If you post a link to Twitter, a bot will do its thing and fetch a thumbnail. They will not d

> Websites modify user content all the time. Not manually though. If you post a link to Twitter, a bot will do its thing and fetch a thumbnail. They will not do that only for some tweets but not others. > if you change your website's theme or design in future, you modified all of user content as well Hardly, but more importantly: you don't modify user content based on the user content in question. If you add a new script that will uppercase the first letter of all Tweets, you're altering user content, but I doubt there will be an argument about editorializing since you're applying it to all content.