This is an interesting question that we've been giving a lot of thought to lately. We hope that it won't be a big problem, but if it is we will need to implement public EULAs and a dispute resolution process.

In terms of multiple purchases, we suspect there will be some datasets that are more popular than others. A list of Wal-Mart stores for example could be useful to a number of different people, such as investors, real estate developers, business planners, marketers, etc.