Kwan Ting Chan wrote:
If there isn't, then I would argue we don't
provide an opt out under the
very same reason we don't allow editors to retract their content
submitted to WP now.
Agree. What the community could decide is if they want to move from
"GFDL 1.2 or later" to "GFDL 2.0 or later" or not. But even that would
be problematic if some wikis moved while others not :-(