go to one of your AG friends profiles and see if they got a friend user you dont know, go to his profile and see if there is a friend of his that you dont know and so on.... only everytime you do so you tell the person that you see his profile in a comment that you know him from another guy who knows another guy and so on only mention their usernames........ this could become a wildscaled project so please take a minute to try it and spread it.
this will hopefully make AG's community much more connected.
I advise against doing so as this would lead to many rather pointless comments on many user's profiles from many users. Note that most of the users you've never heard of are probably inactive and their place in a friends link is just a vestige of a time of when they were active. And making a lot of posts that are rather pointless is just... spam, especially since you're just posting the same message to multiple users, changing it only by adding a new name to it.