[cheald]

Ding ding ding. Machine readable and user-friendly.

If you're making your users' experience worse out of a fear of breaking the relative value of screenshots you might need to re-examine your priorities.

[mmahemoff]

And cacheable too.

[jonhendry]

If it stops one long-since-debunked urban legend from being propagated via a screenshot of an old, relative-dated post, it's probably worthwhile.