I’ve been noticing some malicious Twitter users are using the API to add them to your timeline without you following them. For instance, I noticed a user that I wasn’t following in my Twitter timeline. At first, I tried to “Block” them, but that had no effect. The solution? You have to follow them first! Right after, unfollow them. I’m guessing there is some kind of bit that needs to be cleared by following/unfollowing.

• Do you have fitnessalways on your twitter? Ever tried to simply block the user? It doesn’t work. You’ll notice that this user is automatically added to your twitter timeline. To remove, do the Follow and Unfollow trick right after.
• Block only works if you don’t want them to see your tweets. It has no effect on your timeline.
• Use the follow/unfollow trick if you notice a user in your timeline that you are not following
• Report Twitter spammers to @spam