We are in IT, they should respect our authoritare!

Just disable the fuckers' accounts it always gets your respect! Nothing like a fucktard coming grovelling to you to get their account re-enabled
oh and if they have to ring a helpdesk then thats even better cos then they are on hold for 40 minutes before they get through, just keep doing it heheheh

or just "login" as them 3 to 5 times depending on group policy and lock their account out