Identifying compromised logins

How can an ECCIE registrant confirm that a login has not been compromised and used to login from different computers or at different times? I do not expect that mine has been, but the concern regarding that possibly reduces my comfort level in posting.
While root admins could theoretically log the source IP at login, they aren't going to share that with users.

The simplest fix verify the integrity of a login is to change the password routinely.
In the upper right, under "Welcome, [username]" and above the private message link, it shows "you last visited: [date and time listed]." If someone else is logging in on your username, keep track of when you last visited and see if it matches up when you next sign in.
CONFUSED