I'm talking about the buttons that read 'save to delicious' or 'digg this' or 'stumble this'
People who don't frequently tweet or save to delicious won't start because of a huge button on your website. The ones that do, already have their own tools and MO for doing so.
The services that don't provide cool bookmarklets or API's or tools are the ones that benefit from those buttons. People appreciate the time saved, but are those services really worth the real estate their buttons take up? I mean, have you ever used Fark?
Why not make your site cleaner? Those buttons are almost always hideous, save for some very few, but very cool, designs. Plus, they steal attention from your own call to action buttons. Like 'comment' or 'buy'
People who don't use twitter or facebook or digg or delicious or what have you are simply nauseated by the constant 'Tweet This' call out they see on sites. Wouldn't you be?
When I switched from IRC to Yahoo!, the one thing that was most annoying was how intrusive IM windows became.
You'd be minding your own business and then, suddenly, the center of your screen was covered by a chat window saying 'Hi'. Well, I eventually got used to that.
Then came the Age of Mass. Skillfully tailored mass messages, made out to look like they've been meant only for you. And then, people just got lazy and started blurbing out all the inanities they could come up with. All ending in 'sorry for the mass'. It was a dark age for communication.
Then twitter came along.
All the messages were mass messages, they were meant to be mass messages. You knew that upfront. The one monumental advantage? you could check your mass messages whenever you felt like it. I don't know about you, but I like most things to be unobtrusive.
Also, twitter has reduced the number of chain-mail messages I receive. It's way easier to drop a bit.ly link into a tweet.
So, even though twitter still annoys a lot of people, it has brought some good into this world. Whether you realize it or not.
Now, when I get a mass message, I don't mind anymore because a warm feeling of nostalgia sets in.