thibault asked if it’s possible to hide the image title that appears when hovering over an image, as it may contain unwanted data. JammyDodger explained that the text is the same as the text displayed in the composer when uploading an image, and can be edited or replaced with something more descriptive. However, the image title also appears in search results and oneboxes, making it impossible to completely obscure it.
That’s the text that shows up in the composer when you upload an image so hopefully won’t catch anyone out as it will be displayed there when you create your post:
People can edit it out and replace it with something else (hopefully something more descriptive if they are kind and thoughtful people 
) from in the composer or there’s a nifty shortcut on the Preview that accomplishes the same thing:
It also shows up in the search and oneboxes, etc so there’s no practical way of obscuring it.
