Info on cults

I'm writing an assignment on cults and I am trying to identify how to find them and what their main "beliefs" are. I don't want destructive cults, such as those that include mass suicide etc, but they can include some form of "brainwashing", advantage taking or strict rules etc.
I find this subject really interesting, which is why I am writing about it, but I have tried searching the internet and all I can find are those that have in the past had mass suicide pacts or those that are pretty much just straightforward christianity which just a slight difference. I can't find any scary inclusive cults which is what I need! Any ideas??

 

westboro baptist church.
the church of scientology.

 

Oh yes, Westboro Baptist Church - what lovely people they are

 

ISKCON is considered a cult by some.

 

Scientology!

And if you want some real info a bunch of hi ranking ex-scientologist and experts on this particular Cult have joined these forums:

Anonymous vs Scientology hipforums

The Un-Funny TRUTH about Scientology Another look at Scientology