Sorry, when you said ‘and everything above’ I thought you were referring to the things I’d listed above.
Reading it the other way, fair enough, you’re drawing the line for anonymous travel at private boats or planes. Personally I don’t think that’s helpful as they just end up chartering them from shell companies they own so their details aren’t attached to the flight so they can dodge scrutiny that way. You can try to investigate the companies but they’re anonymous that often all you can tell is they’re a charter firm a particular person uses a lot. That might be enough, but personally I’d rather either have proper accountability, or accept this isn’t the way to do it.