They need to make sure their publishers are spiritual or give them the boot. The WTS NEEDS the monthly report to keep the congregation clean of slackers who could give a bad example to the rest of the flock.
I must say that they don't annoy me that much concerning non reporting. About one year ago I told the elder on the phone that preaching one hour a month was equal to not preaching at all and that he could just as well count me as inactive, that's what he did and it was the end of it. I turn up to WE meetings with my wife once a week, they seem happy to see me, we shake hands and they leave me in peace, they don't hound me, never raise any question about resuming preaching. Q-U-I-E-T.