Link widgets can be easily broken

[SteveMarvin]

Tags are not "atomic". If I drag one tag into the middle of another, they both break. If I shift a widget around in the text, the widget "identifier" may not be accurately moved with it, which means the tag no longer works on the page, but the resource to which it links will still bring you to this page.

Tags should be unbreakable via accidental insertion or deletion.