I work in a Gov't office where the rules governing workplace harrassment are so strict even a 3rd party who overhears your private conversation can complain and get you in shit. Also the computers are strictly overseen. Yeras ago they gave us computers and then added the internet, e-mail etc. But use it for any other reason than work and you are done. I can understand that to a degree but because it is Gov't and not private biz they are so anal about everything.
WE still send jokes but if they have sexuall content look out. Best delete that sucker upon receipt and do not forward. We also have a mixed workplace where the secretary's are nice and we can tell jokes however discretion is the key to that also. Like I said serious topic.