…a long term defense will have to come from the developers at Twitter. They will have to implement a solution that requires you to approve followers before they can show up in your list, or they will have to implement a timed follow limit that will prevent people from following more than five people in a twenty minute period. That way it would be a pain for would be Twitter spammers to follow people by the thousands.
- Open Source Marketer: How To Fight Twitter Spam (04/24/08)


