Google did something similar: https://en.wikipedia.org/wiki/Google_Buzz#Privacy
Absolutely.
Google+ became really nice towards the end, but HN kept hating it, and I guess partly because of Buzz.
> Google Buzz publicly disclosed (on the user's Google profile) a list of the names of Gmail contacts that the user has most frequently emailed or chatted with.
Google Buzz is something you definitely don't want to be similar to.
Here’s an old article about it: https://money.cnn.com/2012/01/26/technology/google_privacy/i...
I suspect TripleByte is about to learn some similar lessons.