Each attendee gets their own guid introduction as usual, just by scanning a QR code or something, just before or after the talk. The same basic introduction protocol works here, the QR code just names a guid address that has constraints on it (time-limited maybe, or that limits introductions by number of attendees).
Corner cases like this have solutions, and even if they're a bit more awkward, who cares? 99.9% of people who suffer from spam don't encounter these corner cases. Should a solution solve the biggest part of the problem, or prioritize making the corner cases easy?
Attendee? What year is it in your world? (Also, time-limited is stupid for this case.)
This isn't an edge case - people pass out addresses expecting to be contacted by randoms all the time.
And, most contacts are second-order or further, so introductions aren't even possible because there's no common link. (I pass on "you should contact {other person}" to groups that I don't control all the time.)
I get that you're proud of your introductions hammer, but you don't get to ignore the existence of screws.
Perhaps you're unaware that most public talks take place at conferences, which yes, still have attendees.
> (Also, time-limited is stupid for this case.)
Time-limited is perfectly fine policy for some cases. Maybe you have a different case in mind, but that wasn't specified in your scenario.
> This isn't an edge case - people pass out addresses expecting to be contacted by randoms all the time.
And? If you want to open yourself to a flood of possible spam, then create an address just for that and publish it. Nobody's stopping you.
> And, most contacts are second-order or further, so introductions aren't even possible because there's no common link
What does "second order" even mean if not "someone I know knows them"?
There's nothing stopping the use of public addresses, the point of the proposal is that most people don't need it, and the default public nature of email is what creates the security and spam nightmare that it is.
Corner cases like this have solutions, and even if they're a bit more awkward, who cares? 99.9% of people who suffer from spam don't encounter these corner cases. Should a solution solve the biggest part of the problem, or prioritize making the corner cases easy?