I just want to note that if you use friendly timestamps ("posted 3 hours ago"), you take a big responsibility of having them _always_ be correct in any situatio

I just want to note that if you use friendly timestamps ("posted 3 hours ago"), you take a big responsibility of having them _always_ be correct in any situation and automatically update without reloading the page, etc. They also need to index to Google properly, in a non-friendly format.