If you want to upset a Jehovah's Witness, refer to the Watchtower as a sect. If you really want to upset a Jehovah's Witness, refer to the Watchtower as a cult. That's pretty much a conversation stopper.
The Watchtower denigrates the rest of Christianity. It doesn't even refer to the rest of Christianity as such, preferring the putdown of Christendom. But looking at it from the outside in, the similarities between the Watchtower and Christianity are far more numerous than their differences. One seeks to control the lives of its adherents more closely than the other, but only from the modern perspective. Christianity's been around for 2,000 years, after all. As much as modern Christians (including Jehovah's Witnesses) prefer to compare themselves to the first century Christian movement, what about all those centuries in between?
Who I am is not only the man I am today plus who I was as an infant but the person I was over the course of my entire life. When I'm a very old man and my days are dwindling down to a precious few I will look back over the course of my life and I will judge myself. This has nothing to do with an eternal hope, because I have none, but because I acknowledge responsibility for all the things I have done in my life, in particular the things I have done that hurt others. I am the sum of my parts. So is Christianity.
Christianity it is not defined by what it is today but by what it has been throughout the ages, and how it has affected the lives of countless billions of people. Christianity is not a modern phenomenon. Through the ages and even as recently as 50 years ago, the stewards of Christianity - the popes, the prelates, the kings, the emperors and the rest - were as or more oppressive in their control over the lives of people as is the Watchtower today. And when I look upon the works of Christianity, past and present, I see a picture that is not beautiful. So, the question I have to ask myself is, if the Watchtower is a cult, as so many people in here believe, is Christianity itself a cult?