I hate to say it because I don't have any friends, but I notice I get a lot of friend requests when I do well in raids.[/quote
This is because people often use BNET as a list of acquaintances to avoid fully having to pug everything. Which is fine.
I kinda wish we could sort BNET friends into categories and only broadcast to specific categories. Communities are very nice but trying to get, for example, a raid group to pay attention to that instead of Discord is pretty troublesome, especially since the default option in-game is to not have it integrated into the normal chatbox.