[CentOS] sticky bit inside user's dir

Hello there,
I have the following problem. I need a user not to be able to delete
(rm -rf) a dir inside his home directory (a dir which is owned by him).
The sticky bit is supposed to do just that... and it does, in every part
of the file system but in his home.
Same goes for acls (setfacl -m u:user:rx dir), a rm -rf inside his
directory will render the acls useless.
 Is there any workaround against that?