Security concerns: I don't necessarily see that as abuse, anyone can record all records of something and if something gets wrongfully deleted someone can add it back in. There may be times when someone needs to delete a certain record, for example: when someone is bartering something in exchange to harm someone. Database hosting: anyone can host the database because I have the files in the repository. TOR: the benefit of TOR is to prevent some entity from tracking exchanges and it keeps people anonymous and with bartering real life goods you don't necessarily need to break anonymity, there can be intermediaries to keep things anonymous. What happens next: when a person sees the record and they have what the other person wants, the first person can contact the person who has the record and negotiate the trade.