When it comes to matters of copyright, some companies have an earned reputation as being attack dogs. They are known for filing takedown notices at the drop of a hat, throwing lawsuits around at will and generally intimidating anyone that they feel gets too close to their intellectual property.

Though there is nothing wrong with being aggressive about your copyright, especially when you make your living from it. The problem comes when companies cross the line and sacrifice the rights of users and the public in their bid to protect their work.

These attack dogs are dangerous for many reasons. First, they are the ones most likely to file takedown notices, including against bloggers. Second, they often times trample free speech and run afoul of the law. Finally, they also end up writing both the copyright news we read and many of the copyright laws we follow.

So who are the most aggressive copyright holders? Though such a list is entirely subjective, here is my personal list of the most aggressive major copyright holders I have been tracking. [Read more…]