root@XXXX:/tmp/testme
# touch \\
root@XXXX:/tmp/testme
# ls -rlt
total 0
-rw-r--r--   1 root     system            0 Feb 15 15:39 \
[download]

But...

You're right about / ! Don't use the directory separator! How embarrassing! Actually, it ,is legal, but far too problematic. I'll have to skip that one for now.