Someone else has done a similar analysis before:
http://libresoft.dat.escet.urjc.es/cvsanal/php-cvs/index.php?menu=Index
in particular:
http://libresoft.dat.escet.urjc.es/cvsanal/php-cvs/index.php?menu=Modules&module=phpdoc
These are a bit old.
so can you give us your url ? :)
And it is not strange the many do not commit, a good number have a php.net account for show ;-). Similar statistics can be seen for PHP, PEAR, etc.
So, why not delete them?
erm, I'm not sure you want to start this war .. :)
didou