[Bish0pQ]

I'm not entirely sure how you'd to that. You can indeed try to do it with a rogue access point and then getting their telephone numbers/emails in that way. I mean i'm not saying it's impossible, it'd just be a little hard to do, just for a prank.

Even if you'd Wireshark the AP, it still wouldn't guarantuee that you'd get a single email or telephone number. It'd probably be easier to "hack" the restaurant's database and from the reservations table (if there is one) grab all phone numbers/emails.