It seems that at least somebody uses aide:
snippet from article:
"Also, klecker, murphy and gluck have "Advanced Intrusion Detection
Environment" (package aide) installed to monitor filesystem changes
and at around the same time it started warning that /sbin/init had
been replaced and that the mtime and ctime values for
/usr/lib/locale/en_US had changed."
Hooray! Keep up the good work :-)