My facebook friend's profile is unactive,then active the next day, he still is my friend, i didnt re-add? how?

[chess10771]

Why does one of my facebook's friends profile become unavailable and than comes back after a couple of days?
I have a friend on facebook who, when i search him, shows up and i can view his profile. Than for some reason the next day I searched for him and I couldn't find him. I even looked on all of facebook and it seems like his account was deleted. Than like the next day i searched again and he was still my friend and now i could see his profile. I didnt re add him and he already had his old wall post and his old pics. What is he doing to be able to do this? Please be thorough in your explanation. thanks

[Ignatius]

That happened to me too and it turned out that my friend had deleted her account and then reactivated it. She had all her old wall posts too, and everything seemed to have been restored.

[Srsly, WTF]

if you delete your facebook, they de-activate it. however, once you re-activate it, all your old information and friends are still there.