1. every Tweet has to be approved by legal.
2. you plan to use Twitter like a giant RSS feed,
3. you think using Twitter is a social media strategy
4. you think it’s a good idea to have someone tweet as if they are the president of the company.
5. you are not going to respond when people direct tweets at you.
6. you think paying for followers might be a good idea
7. you think all that matters on Twitter is getting a lot of people to follow you
8. you want to protect your updates.
9. you plan to track Twitter with Google Analytics
10. You think you can market to people with whom you have no relationship

Full Story: BL Ochman’s blog