Now that those buttons are all over the web it's going to be very hard for a new news reader to get us to add yet another "share on RSS system" button.
People don't notice their everyday surroundings and daily routine, so when writers describe them it can sound as if they're trying too hard to instruct the reader.
The path to each decision is so short and irresistible, more like an electric pulse than like a weighing of options, that the reader is hard-pressed to explain what happened.