This could perhaps be a dastardly plan: Automate the process of registering new usernames on the network and register all available names up to say 10 characters (or perhaps all dictionary words, one or in combination up to a certain character length for ’simplicity’). Pretty user unfriendly for everyone else at that point right?!
Plus the person/entity which did that would be able to hold the network to ransom just like people currently do by parking domain names.
Possible (although not perhaps desirable) answer is charging for registering a username with Safecoin. Another answer perhaps is to only allow users who also own vaults above a certain rank the permission to register a username (if indeed that is how users/vaults are linked if that makes sense). That would be an inherent cost of contributing to the network to stop this sort of mass name registration.
Knowing you guys this has already been addressed in some ways but just thought I’d mention it in case not