[Anti-hacker hack v1.0] :þ
#1.
Make sure you delete user admin5 AFTER makeing another name admin, or change the password and name in the member file it's self(usualy 0000001 or whatever).
#2.
If they can find your members directory they can get your passwords. Suggestion: hard to guess name for members folder.
3.
If it's an easy password they can just run a brute force program on it and find it. (in most scenarios that is) Suggestion: hard to guess pass/name. (since in 6.2.x you can change your displayed name it shouldn't matter what your login name is

)