Earlier quoted context omitted.
Exactly. For most people, that's probably enough. I couldn't see the business case for creating a whole social network out of the concept. For myself though, I could easily see creating 9 or 10 cards for different situations. It'd be nice to have an easy way to manage all that.
What you need is an "premium" email at a "premium e-mail provider". :) You signed up as Joe Doe and plug your basic info: website url, physical address, your real email address, phone number cell phone, etc. All this can be in multitude quantity, like your email: office job 1, office job 2, personal. All this info is confidential and only seen to you. Then your conference comes in. You click "create addresses" and sy…
Of course this plus-sign behavior is a pretty well-known fact about Gmail, so it'll be obvious that you're bucketing your email in this way. Anyone can easily read off the 'base' address johndoe@gmail.com, so you'd need to set it up so that mail to this address is heavily restricted and anyone wanting to actually reach you would have to use johndoe+secret@gmail.com or whatever. But I think this would basically also be true of any custom service you could invent having similar functionality.