As some of you might know by now, there's currently being worked on how to best implement poker on-chain.
This will raise challenges in terms of limiting (or completely preventing) collusion from players.

What could be done?

Obviously, we've thought about IP-restriction but this alone might not work due to the fact that there's no KYC and it'll be possible to sign up/log in directly with your HIVE user.

As a means to avoid cheating, what ways could possibly prevent collusion?

How do we "slam the door" and avoid 1 person controlling multiple accounts?

We currently have a wide open door for cheating, and before we start implement it:

Let us close it!

All ideas are welcome in comments.

Thank you in advance, lovely community