In OSM we are trying to keep our database free. If we allow people to
add copyrighted data into OSM then that harms the idea of a free
database. Firstly, it could earn us a “pirate” reputation and some of
our “competitors” would be happy to use anything to tarnish OSM.
Secondly, it could even lead to an innocent OSM user becoming the
subject of legal action because they used what they believe to be free data.

Hence, if there is reasonable doubt about the legacy of a source (e.g.
the source has a copyright notice on their web site…), we should
follow up on that; and if we then contact those who contributed the data
and they either remain silent or vanish, then we should err on the side
of caution and remove the data.

That has nothing to do with “random OSM users deciding legal matters”,
it doesn’t make us “uneducated”, and neither “role playing as copyright
lawyers” (all quotes: @slice0) - it is simply good judgement.

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