Wonder what would happen if you hid a symlink pointing to root as one of the files. Someone without a doubt would rm-rf.
/tmp $ mkdir -p a/b/c
/tmp $ mkdir -p a/d/e
/tmp $ cd a/b/c
/tmp/a/b/c $ ln -s /tmp/a/d .
/tmp/a/b/c $ cd ../../
/tmp/a $ ls */*
b/c:
d
d/e:
/tmp/a $ rm -rf b
/tmp/a $ ls
d