There is another solution to this problem in discussion at Japanese Wikipedia and Wiktionary. It is a bit easier than the migration to GNU Free Content License, though I would love to see it happen soon.
We may introduce another license - so-called "intra-site public domain license" or "intra-wikimedia public domain license." What the license says is something like this:
"by contributing to Wikipedia, you allow others to use your contributions within Wikipedia's projects as if they are in public domain."
Copying and pasting of GFDL texts are against GFDL in a small way. And it happens in many contexts. (Moving Village Pump discussions to appropriate talk pages, dividing an article into two pieces, using a boilerplate texts, using {{subst:}}, etc.)
It is a bigger concern in Japanese Wikipedia, partly because fair use usually have to include attribution according to the Japanese copyright law, and because we do not yet have solid evidence to think that substantial compliance in spirit is safe enough. In other words, if a troll says, "hey, you violated my copyright, because you copied and pasted my contribution into another page without following GFDL, and I am going to sue you," that's not something we can laugh at.
The introduction of the PD license is also a way to reduce interlingual troubles - the required level of compliance at Japanese Wikipedia is a bit more strict/ literal than that suggested at en:Wikipedia:Copyright. But some English Wikipedians may not know about it, and bring an image or translate an article to English Wikipedia from ja. without fulfilling the requirement. That, again, is a violation of GFDL, and therefore likely a copyright violation.
If we introduce the "intra-wikimedia public domain license," we don't have to worry about it.
If English Wikipedia can also introduce similar license, that would make things more convenient.
Also, just in case it matters, we would still promote the GFDL-compliant preservation of attribution, the purpose is just to reduce the risks from legal technicalities, not to trivialize the attribution altogether.
Regards,
Tomos
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