Every now and then on the CPAN we get some variety of weird, unusual, destructive, or simply batshit insane insane authors.
Typically they upload one, or two, or 10, or maybe even 20 modules of dubious value, and then most of the time they burn out after 6 months or so and dissappear.
Every time this happens, discussion will circulate pondering why we don't crack down on people, or restrict uploads or something of that nature.
This talk by Clay Shirky provides what I think is the best and most elequent explaination I've seen yet of why CPAN continues to maintain such low barriers.
Of course, full credit for maintaining this policy for the CPAN goes to Andreas, who understood this long before the rest of us, and continues to hold firm in his position.