When Philippe uses his WMF account, per his user page, he is acting for the WMF in his staff role. If this was a mistake then fair enough but it should be explained by Philippe not assumed by everyone else.
I am unclear about the WLL central notice. Is there a discussion somewhere that explains why this notice about a regional GLAM activity would be a central notice rather than a USA specific Wikipedia geonotice?
Link: http://en.wikipedia.org/wiki/User:Philippe_(WMF)
Cheers, Fae