It's threads like this that make me glad I made the decision NOT to tell families and friends that I bought into
DVC! ]
I was thinking the same thing! The family I was born into (to differentiate them from the family I made with DH) would have no problems inviting themselves on one of our trips, or even better, asking to use our DVC some time we "don't need it". I don't ever lie to my mother but I find myself "leaving out" certain details. She knows we are going down next month and I told her I am staying in a friend's timeshare - I won't be telling her that my dear friend is actually DH.
The sad thing is that we purchased over 500 points so that we could invite friends and family along but when we look at the dynamics of the personalities, it looks like we will be skipping a generation and inviting my nephew and nieces but not their parents, if we ever decide to tell people about DVC!