Evidences?
Lack of evidence to the contrary. When people disagree with something,
they generally say so quite loudly. When people agree with something,
they are usually much quieter. I've seem plenty of people complaining
about the application of BLP to a particular article, but few
complaining about BLP in general.
If we go by what happens BLP does not exist unless an
admin with an
agenda turns up.
*shrugs* Then that's the policy.