[haraball]

On the other hand, it also removes the need to contact that person since you already know all the latest news. I'm not comfortable in situations when I meet people I don't see often and they tell me things that I already know, and I have to pretend to not knowing it to avoid the stalkerish feeling it gives me.

[glhaynes]

I know the feeling. In that circumstance, since the person apparently wants to talk about that news, I try to find something to ask them about it that I don't already know the answer to. Which could even just be to ask them how they feel about that news (which can be in the form "I bet you're happy about that...", etc), since I don't usually know that. That way, they get to talk about what they want to talk about and I get to hear about things I don't already know. Whether to make it clear that I already knew the basics or not depends on the circumstance.

[robryan]

It's the issue with people putting a lot of stuff out there but expecting people to consume only the newest stuff and forget that anything older exists kind of like real life conversations drift from relevance over time as subjects change.

Something like reading back through a few months of someones Facebook isn't really socially acceptable even though they are putting it all out there.