But I'm concern about this service and privacy. It uses same tactic as Buzz (which tactic I didn't like).
Here is my understanding - please correct me if I'm wrong:
First, Kik ties in a person's username with their email address. Kik then sorts through the person's addressbook to find potential friends. This is kinda privacy issue because a user may not want someone that is in their addressbook to know they have a Kik account. But other people (my stock broker, tax consultant) will because if they have your email address then they also have your Kik username without authorization or adding that person to your friends list.
Is there a way to disable the above approach - maybe to ask which people will see you on Kik?