It took me a long time to figure out that when people respond to you on twitter-like systems they aren't actually speaking to you, they're talking over your shoulder to the masses they imagine are reading what you posted. Three comments. 1. There are no masses. You can see this by looking at the stats for each tweet, available on most platforms. 2. Most users on the social web are trying to get attention for themselves, the only reason they read the posts is to see if there's a place for them to attach their message. 3. A simple tweak to the software would make it so that only the author of the post being responded to could see the replies. Then they could RT a reply if they thought everyone should see it. This would make the social web a lot more useful imho.#