Also, this should be present as a default-core-installed plugin/app/module and should not be that I have to install it separately - as a new user I was so confused how to set up my Friends Lists and then after much xxxx I found that it is "hidden" in the Apps lists. Yes, let it be un-installble if you need so.
So, does this mean in Zap etc, others can see (or even if they do not by default, there is such possibility) my "Privacy Groups" that is, can others see who are my office friends who are my family Friends etc etc
Forums/Groups do not exist in HZ/Zap as per the most current convention that is used in commercial Facebook or free opensource php projects such as Elgg/Buddypress or Peepso(Wordpress)/Humhub. In all these examples, Groups are basically rooms or spaces or "Groups" (hmmm) with an Admin (one Admin usually) who allows you to join spontaneously or by approval or by invitation only.
Its really customary to have a PM/DM button or link below your profile pic JUST AS you have a CONNECT button - it is as simple as that.
And a circle is just a sorting tool.Though it could also be "a circle of friends".