[[!comment format=mdwn
 username="joey"
 subject="""comment 2"""
 date="2018-09-11T16:33:15Z"
 content="""
The only risk in doing this is that if you somehow later add a file that
actually uses that key it will have this metadata.

There's no garbage collection of metadata except for keys that have been
marked as dead with `git annex dead`.
"""]]