You can’t prevent someone from sending you a check in the mail; you can simply not claim it.
People have been sending coinjoined bitcoins to states and legal entities for ever; there’s nothing they can do to avoid it, but they can ignore the money
Discussion
Yes and no.
I haven't seen a cheque in my whole life. Just heard about them 😆
How long can you cash in a cheque? How long can you redeem your zaps?
You have them, they are yours. You hold the only key to use them, and I don't think that it matters if you use them. I'm sure in some countries the possibility to redeem is also enough to make a taxable event out of it.
Don't get me wrong, I love your work and I'm amazed by the speed you are coming up with new stuff.