I will say that I am a lawyer but this is not legal advice - you have to pay for that!
My in-laws recently gave me and my wife their membership as our wedding gift. To put the deed in our name we have to file a gratuitous transfer with Disney. This is allowed and is common. It still goes to ROFR - as explained above by another poster - but they don't exercise ROFR on it because it is a gift.
In speaking with the member admin about this she acknowledged that in all reality, if someone really wanted to get around ROFR they could go this route. And they know that people do go this route. But its few and far between and probably not worth their efforts to fight it. There were red flags that make it obvious that it is not a gratuitous transfer (i.e. a broker is involved, there is a contract for a low amount, people don't live near each other or appear to have any connection to each other, etc.)
I will not opine on the legality or ethics or morality of doing a gratuitous transfer with a friend that you know and trust, but just say that Disney is aware of it, it is common, and there is a procedure for it. You just pay the $425 or so fee to do a title transfer (which Disney used to do but now outsources to First American Title).