No problems, all I was addressing was your point that Marriott points converted to miles could not be deposited into someone else's account. Since Marriott allows people to combine points for an award, essentially airline miles can be added to anyone's FF account rather than just your own.

So if Worthing Scottish's friend wanted to put some FF miles into Worthing Scottish's account, then it might actually be possible to do so using some of those 500K Marriott points.