Someone posts something that makes someone else mad. That person retaliates with personal attacks, which leads the other person to retaliate. Other bloggers join in and post about the drama. Minions on all sides join ranks and battle each other to defend their favorite blogger. In the end, no-one wins, because they're all pathetic losers. It's so sad, but at the same time, highly entertaining to those of us on the outside who can only shake our heads and call them out for the losers they really are.
Blog drama tends to occur more between bloggers who've met in real life or at blogmeets who think they know each other after a few hours or a few days. These people are delusional and should seek help immediately.
Blog drama also occurs between bloggers who've never met, but exchange links and emails. It can also involve their visitors (aka: Minions) who are sent attacking at the first sign of drama. More times than not, the "minions" feel a strong desire to defend their blogger, which leads them to troll the offending blogs and leave asinine and disruptive comments. These people have low self-esteem issues and are tend to poke their noses into other people's business. They should seek help as well. I also suggest taking up a hobby.
Simple Cure: Get a life and step...