So by your logic, it would be okay for a twitter employee to modify a tweet from of the president's account to declare war (or to any number of things that would have very real repercussions in the real world)
I take no issue with the modification. Trying to start a war is wrong, but that's true regardless of method. Giving someone food isn't a problem, giving someone food you know they are deathly allergic to on the other hand is. They would certainly be responsible for any damages they caused through malice or negligence, but they have the right to face those consequences.