Up until last week, I followed back anyone who followed me on Twitter. Using Social Oomph, it was done all automatically without me having to do anything. If you followed me, minutes later I would automatically follow you back.
I started doing this for two main reasons. First, I wanted to follow back everyone as a courtesy. If you made the effort of following me and listening to what I had to say, then I considered following you back was the polite thing to do.
Second, I wanted to follow back everyone because I assumed that it would get me more followers (a lot of people are following you hoping that you will follow them back, thus increasing their followers count).
After a short while this became completely unmanageable. There was only one solution: mass unfollow everyone and start from scratch!