'The primary reason for disfellowshipping is to "keep the congregation clean." That's code for keeping the unbelieving
one or the one practicing actions against WT policy from affecting the congregation members- taking them out with him.'
I never was a JW, and now I'm an atheist.
Considering this logically (and perhaps 'logic' and 'JW' should not appear in the same sentence) IF the JWs were the one true religion, under the protection of an omniscient and all-powerful god, directed on earth by some 'chosen ones' with direct comms with said god, why should they be scared that some individual with an enquiring mind could taint them?
Their writings say that god can and did strike people down at will (though apparently he got a bit more liberal in later years) so what have they got to fear? There were 'striking downs' in the NT, and even here in Paphos Jesus Barabbas allegedly got blinded in a show-down with Saul/Paul.
On the basis that their god could instantly kill/make dumb/whatever anyone who was a threat I think that they're displaying a lack of faith in their own teachings.
Oh, and when things go wrong or get difficult, don't the hierarchy teach that god is testing them and 'tempering them in the fire of faith'? Couldn't letting some thinkers and questioners loose among the 'faithful' be seen in the same (new) light?
Perhaps the D/F practice is all about control, after all. I like the analogy quoted about the schoolkids choosing to exclude just one kid.