"my lawyer advised me that it had never been tested in court, and the legal costs alone of being a test case would bankrupt me."<p>This is a very real problem with law surrounding emerging business practices, esp here in the US.<p>Ultimately you can only pioneer whatever you can afford to defend in court. Facebook, or any other BigCo for that matter, can assert that you can't do X and it's up to you to fight it in court... Even if there is prior behavior such as with this case. Clearly Google does the very same job and doesn't have an agreement with Facebook to spider their site.<p>But if you can't afford to defend it and bring up the prior examples in a court, then Facebook - or anyone else for that matter - can stop you.