Re: #!comment:
Obviously many attackers are using a well known password.lst file as the basis of their attacks.
This file starts:
#!comment: This list has been compiled by Solar Designer of Openwall Project,
#!comment: http://www.openwall.com/wordlists/
#!comment:
#!comment: This is a list of passwords most commonly seen on a set of Unix
#!comment: systems in mid-1990's, sorted for decreasing number of occurrences
#!comment: (that is, more common passwords are listed first).
#!comment:
#!comment: Last update: 2005/12/16 (3107 entries)
or similar, then has a list of passwords.
So I think that there may be a certain amount of "parsing fail" on the part of the attackers, they're treating the comment lines at the top of the file as entries and using them as the basis for break-in attempts in addition to the proper entries in the file.