What if Alice leave her home directory permissions open? Mallory can then move a large file there and have it assigned to Alice's quota. I suppose it could wor

What if Alice leave her home directory permissions open? Mallory can then move a large file there and have it assigned to Alice's quota. I suppose it could work, but Mallory would then risk Alice blowing that file away (perhaps innocently, not even realizing it was Mallory's file).