You were once encouraging the fake foriegn sponsorship scam
I've never encouraged it. I've noted that people do use it, and that it has drawbacks, such as convincing the OFAC that it's legit.
As for the rules, even the CBP doesn't enforce them, or enforces them haphazardly and without proper knowledge. I've seen this happen more than once, and with people from various countries as well as myself. There is NO coherent policy vis a vis cruisers going to or coming from, Cuba.