I did -- would you believe I tell my mom about Disney's rules -- and within 15 minutes my sister emailed me to tell me that she had already gotten the days off approved and would it be ok for her to crash on my floor.
I really don't think the rules mean anything to them. For example, last year we rented a house on the Outer Banks. I specifically got permission from the company to have my 3 dogs stay - I paid for the house and all deposits for the house and my 3 dogs. Well, my sister shows up with her dog. I take them aside and explain to them that if her dog gets caught in the house, she will have to pay me for the week's rental, etc. (this was not considering ruining our vacation) --- well, my mother laid into me (oh, did I tell you that she gets to tag along for free too) -- I am still the witch out of that situation.