BLP page deleted with a recreation warning and notice about the location of the moved article.[3]
BLP article tagged with {{noindex}} template which has a category which will be automatically added to list on relevant wikiproject, preferably by bot.[4]
If a certain time passes after 7 days, and the non-indexed article is not referenced, it is deleted.[5]
Benefits
This would probably result in the fastest clean up because it all editors motivation to fix articles.
Biography of living person are moved and not indexed by google within 6 hours, not 5 to 7 days.
Wikiprojects are notified of Biography of living person unreferenced articles the minute the articles are deleted and moved to subpage.
Example
New editor writes article on
Z.A. Recht (a horror author)