Some of them are listed below:
- Not having a profile photograph.
- Not having a profile description.
I know some people are really concerned about their privacy and blah, blah but if you are, then you shouldn't be on any social network.
- Someone who has no updates.
- Someone who doesn't have a profile photograph, description or updates.
I am surprised that this guy had over 200 followers without even making a single update.
- Someone who keeps tweeting links to "get rich quick" schemes.
- Someone who uses abusive language.
A good way to lose existing followers as well.
UPDATE: Unlike what some people seem to think, the guys at Twitter are scanning the Twittersphere for funny activity. Clicking on some profiles will take you to this page: