Right on sista. I think the thing with Twitter is that everyone uses Twitter to communicate in different ways, so we each have our own "rules" when managing the followers/the following. 

My Twitter Rules:
1. Don't quote famous quotes all day long.
2. Have something to say. Don't just RT other people's original thoughts.
3. Either make me laugh or inspire me.

Red flags for me:
1. You have a zillion followers--a few hundred to a 1,000 shows you've spent time weeding out the bad from the good. I'm not impressed that you have 10,000+ followers.
2. You have glaring spelling/grammatical mistakes in your auto reply.
3. You don't have a blog
4. You don't have a real picture of yourself