The problem with twitter in particular is that it lets you do two things: read and post messages. What granular options do you see?
But since you asked, here's a couple I can think of: * A rate limit on the number of Tweets per hour/day/week * Ability to follow or unfollow * Ability to index my tweets if they're private
1. Read Tweets 2. Write Tweets 3. Read direct messages 4. Write direct messages 5. Follow someone 6. Unfollow someone 7. Create a list 8. Add to a list 9. Remove from list 10. Delete List 11. Edit profile information/avatar ..etc...