For the last 10 years or so, it seems like it has mainly been people who are opposed to the NKT writing about their experiences on the internet. Why is this? My opinion is that most people who are involved in the NKT don’t have a whole lot of time for this kind of thing. Most Kadampas do volunteer work for their Center, have part time or full time jobs, study on the NKT study programs and have daily meditations and pujas that they do. Which translates into, not a lot of free time, for blogging and such.
However, I don’t think there is a single Kadampa who isn’t tired of all the lies that get spread about our Spiritual Guide and Tradition on the internet. They say we’re a cult or an NRM (whatever that is). They say we’re murderers, chinese spies, and spirit worshippers. They say our Spiritual Guide isn’t a real Geshe, because he doesn’t have the Dalai Lama’s stamp of approval.
There have also been some people who never really got their practice off the ground. Then left the NKT, and now share their sad interpretation of the NKT in blog posts and such.
The good news is, the future is looking brighter. There are now several Kadampas who are sincere practitioners who are now blogging about their experiences so that outsiders can have a look at how people with positive minds experience the NKT.
Here’s the blogs that I’ve recently come across: Content NKTer, Happy New Kadampa, Making My Life Meaningful, New Kadampa Buddhist, and Wisdom and Bliss
NKT Truth Blog 
Thank you for your effort to spread the truth about the NKT. I have seen some of the effects of these lies directly at my center. People become discouraged because they believe all of the negative things they read on the internet. After quietly tolerating all of the criticism for so long, a decade as you mentioned, I am happy that someone is doing something about it.
I’ve been attending an NKT center (in the southwestern U.S.) for several months now, and have gained a lot of benefit so far. I don’t hear any discussion of the smears; rather, there is just discussion of the Dharma, sharing of tips for personal practice, and discussion of family life and of various volunteer projects people are undertaking to support the center.
Then I jump on the web and see loads of material about how we’re all brainwashed, a cult, spirit-worshippers, harming the Dalai Lama, harming Tibet, etc… it definitely is somewhat discouraging. But I’ve made a choice to decide for myself what the NKT is and whether it is of value, based on my own experience. I guess I’ll keep you posted.