Deletion of Bec Korfball Club

Comment: Bec may well be "the Manchester United of Korfball", but lacking any significant sources, we can't assume that it is notable. The "harm it does by existing" is that Wikipedia has guidelines for what should be included, and those guidelines exist so that the facts of any particular article can be |verified against the available reliable sources. If we ignore those guidelines, then Wikipedia can become a great pool of unverified facts, which reduces its value as a reference source. As for other korfball clubs, I refer you to 
Stance: comment
Cited policy: Wikipedia:Verifiability (WP:V||WP:OTHERSTUFFEXISTS)