Foursquare seems just like a twitter. One can access this by the same devices as a twitter and it uses the same @ symbol. However, it is only available to ages 13 and up. It is only available for own personal use (non commercial). No one is allowed to post anything false or misleading, unlawful, abusive, threatening, etc. You can access third part sites at your own risk. companies are allowed to post anything on this site, as long as they know foursquare is not libel for anything the company said. These services are not the ones who post the information in your account, so it is not their responsibility for any action that could be taken in places because of it.