That baptism gives them all the leverage they need to come in and take over a life. The ability to hold disfellowshipment and shunning over someones head is a powerful manipulating tool. Watchtower baptism is a public demonstration that you have completely submitted to your new puppet masters.
What I don't understand is: Why all the emphasis on younger baptisms when they already beat the drum of backing away from "unwholesome associates", whether or not they are baptized? There has always been an unofficial, basement (wink, wink) disfellowshipping arrangement. Is this new push for control.... I mean, baptism of younger lives the result of that little side arrangement not working so well?