this leaks the identity through the services. you can't normally get an email address or verify who someone on twitter or whatever is unless the user specifical

this leaks the identity through the services. you can't normally get an email address or verify who someone on twitter or whatever is unless the user specifically chooses to share it. you could use this to query the email server, and to crawl various services to match up identities across them. most users do not own their own domains, and this would have to be implemented on the major free email providers to be useful, offering up every user on them for casual identification via any service that displays their image