zlacker

>>chwtut+(OP)
Isn't it extremely difficult problem? It's very easy to game, vouch 1 entity that will invite lots of bad actors

>>abraco+nt1
The usual way of solving this is to make the voucher responsible as well if any bad actor is banned. That adds a layer of stake in the game.

>>speps+Qv1
A practical example of this can be seen in lobsters invite system, where if too many of the invitee accounts post spam, the inviter is also banned.