What ends up in spammer databases

These flagged in the log on one of the mail servers I manage. Normally we pretty much ignore unique invalid addresses, but the joys of UNIX history means the bangpath attempt got them flagged, drawing attention to them. Their database looks like a very interesting harvested database. Whoever allowed these into a form somewhere apparently wasn't validating email addresses well...

sendmail[30697]: k3B4dFsF030697: <!@#$%@******.***>... Invalid route address
sendmail[30870]: k3B4djbW030870: <!@#$%^&*@******.***>... Invalid route address
sendmail[30769]: k3B4dTD1030769: <!@#$%^@******.***>... Invalid route address
sendmail[30986]: k3B4e2Fi030986: <!@#$%^&@******.***>... Invalid route address